captioning sponsored by newshour productions, llc >> woodruff: good evening. i'm judy woodruff. on the newshour tonight, leaders from around the globe conclude a summit on keeping nuclear material out of the hands of terrorists. two of the nation's largest states raise the minimum wage to $15 an hour. then, ahead of next week's primary, a look at a new voter i.d. law-- a newshour report from on the ground in wisconsin. >> we don't think it's unreasonable to take some precautions to assure people won't cheat. >> woodruff: and it's friday. mark shields and david brooks are here, to analyze the week's news. all that and more, on tonight's pbs newshour.

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>> woodruff: most of the presidential hopefuls hit the trail hard today, and while accusations of lies are nothing new this campaign season, this time, the war of words was on the democratic side. >> if i'm so fortunate enough to be your president, i will never forget new york. >> woodruff: despite the cheerful greeting, the jabs are getting sharper in the democratic contest. here's hillary clinton thursday-- after she was confronted with accusations she's taken money from the fossil fuel industry. >> i am so sick of the sanders campaign lying about me, i am sick of it. >> woodruff: sanders fired back this morning in a tv interview. >> well, i'm not crazy about people disrupting meetings, but the fact of the matter is secretary clinton has taken significant sums of money from the fossil fuel industry. >> woodruff: the non-partisan center for responsive politics

says it is a fraction of one percent of clinton's fundraising. the candidate herself focused elsewhere today, talking manufacturing with business owners in syracuse. on the republican side-- john kasich stumped in pennsylvania, ahead of its primary at the end of this month, where polls show him inching up on donald trump. >> i'd rather us be a hopeful country, rather than a country that is hopeless. because hopelessness never gets us anywhere. >> woodruff: as for the front- runner, new details emerged about his surprise meeting with republican leaders in washington thursday. here's r.n.c. chair reince priebus on their discussion about the party's convention in ohio: >> we did talk about unity and working together and making sure when we go to cleveland, and when we come out of cleveland, that we're working in the same direction. and part of that is just talking more and making sure that we've got open channels of communication, so pretty normal stuff actually.

>> woodruff: meanwhile, a pro- trump tv spot hit the airwaves in wisconsin, where candidates face their next major test on tuesday. >> and ted cruz-- he wanted to let in more syrian refugees and give amnesty to illegal immigrants. that won't protect my family. donald trump will. >> woodruff: ted cruz will campaign in the badger state later tonight. and we'll get a report from our own john yang, on the ground in wisconsin, after the news summary. in today's other news, the u.s. economy added 215,000 new jobs in march, thanks to gains in the construction, retail and health care industries. the increased hiring encouraged more americans to look for work, and caused the unemployment rate to tick up slightly to 5%. the better-than-expected jobs report helped give stocks a boost on wall street today. the dow jones industrial average gained more than 107 points to close above 17,792. the nasdaq rose 44 points, and

the s&p 500 added 13. for the week, both the dow and the s&p 500 gained nearly 2%. the nasdaq rose 3%. president obama cautioned the international community today against becoming complacent in the face of a lingering threat of a nuclear attack. at the same time, the president hailed efforts to reduce stockpiles of highly-enriched uranium, which could be used to build a nuclear weapon. he spoke late today at the conclusion of a nuclear security summit in washington. we'll take a closer look at the progress made at this week's nuclear summit, right after this news summary. the death toll from a collapsed highway overpass in eastern india has now risen to 24 people. it was under construction when it came crashing down yesterday in kolkata, just hours after concrete was poured. rescuers continued to sift through the wreckage today but said there is little hope of finding more survivors. police have detained five construction company officials

on possible culpable homicide charges. back in this country, thousands of chicago public school teachers went on strike today, shutting down the nation's third-largest school district. educators and supporters protested funding cuts and sluggish contract negotiations. bargaining between school officials and the teachers' union has gone on for more than a year without a final agreement. >> it is a shame that in order to have our voices heard we've had to close every school in the city. it is a shame to make our voices heard we've had to go on strike, and yet if that is what we have to do, that is what we'll do. >> woodruff: nearly 400,000 chicago public school students were impacted by today's strike. and, the storm system that sparked flooding and twisters along the gulf coast has headed east. the carolinas were under a tornado watch for most of the day, and the national weather service confirmed one twister

touched down near allentown, georgia. heavy winds could be seen whipping across central georgia this morning, a day after at least four tornadoes hit louisiana, mississippi and alabama. no serious injuries were reported. still to come on the newshour: a world summit to ensure the security of nuclear material; two states raise the minimum wage to $15 hour; the impact of voter i.d. laws in wisconsin,and much more. >> woodruff: today here in washington, world leaders-- led by president obama-- pledged to continue the effort to secure nuclear material and prevent it from falling into the wrong hands. margaret warner has the details. >> warner: it was president obama's fourth-- and final--

nuclear security summit, an event he launched in 2010. and with less than ten months remaining in office, he used the meeting of more than 50 world leaders in washington to showcase progress on one of his signature foreign policy initiatives: secure nuclear material and sites worldwide. >> this is a perfect example of a 21st century security challenge that no one nation can solve alone. and the good news is we've made significant progress. >> warner: but the summit comes amid growing fears that terrorists could get their hands on this deadly material. new evidence of the danger: a raid in brussels last november-- at the apartment of a suspected paris attack planner. it uncovered surveillance video of a nuclear official working at a belgian research facility. >> there is no doubt that if these madmen ever got their hands on a nuclear bomb or nuclear material, they most certainly would use it to kill as many innocent people as possible. it would change our world.

so we cannot be complacent. >> warner: even so, administration officials say the video didn't tell them much they didn't already know about the islamic state's intentions. what really keeps them up at night, they said, is something else-- unpredictable north korea's growing pace of nuclear tests and missile launches, and ever-more bellicose language. pyongyang released a propaganda video last saturday-- called "last chance"-- that depicted a nuclear strike on washington. and just today, south korean officials in seoul said the north fired a short-range missile into the sea. in geneva, north korea's ambassador to the united nations said his country will keep pursuing its nuclear and ballistic programs, as long as joint u.s.-south korea military drills continue. back in washington there was progress, apart from north korea. >> nations have improved their nuclear security, including stronger regulations and more physical security of nuclear facilities.

>> warner: the white house announced at least two more countries-- argentina and indonesia, were joining some dozen other nations in removing all their highly-enriched uranium and plutonium, essential fuels for nuclear weapons. >> woodruff: so how much was accomplished at this fourth and final nuclear summit? hari screenivasan picks up the story from there. >> sreenivasan: and for that, we turn to matthew bunn, professor of practice at harvard university's john kennedy school of government. he's also the lead author of a biannual report on preventing nuclear terrorism. so, matthew, what did the leaders accomplish in the way of making sure terrorists don't get their hands on nuclear materials snnches well, i think we've seen some solid progress at this summit today. we've got, finally, the entry into force of a key nuclear security treaty that provides a letter legal foundation for our nuclear security work and china has agreed to implement an initiative that focuses on all

of the i.e.a., that is the international atomic energy agency, nuclear security recommendations and accepting peer reviews. we've got hundreds of kilograms of weapon-grade highly enriched uranium and plutonium moved from japan and these two countries committing to eliminate all the weapons-usable material on their soil. but i think we also see some missed opportunities. we still have no global rule that says if you have a nuclear weapon or the materials to make one it should be at least this secure. and we have only modest strengthening of the nuclear security institutions that will have to take up the slack when we're not meeting at the summit level anymorehouse right, so there is an agreement that there will be continued meetings, right? but it won't be between presidents. >> that's correct. so essentially a group of interested states have agreed to keep meeting at a senior official level once a year or so on the margins of international atomic energy agency meetings to try to keep the attention on

nuclear security and get us on a path to continuous improvement in nuclear security. >> sreenivasan: when we heard about nation states deciding to take highly enriched uranium and make it less so, there is still a concern that in other parts of the world there are components that are readily available or somehow can be accessed that can turn into a dirty bomb that a terrorist doesn't necessarily to have a warhead to put on a rocket to cause havoc. >> what we're worried about is not really a warhead on a rocket. there are three sets of things you might worry ant. one is terrorists getting ahold of nuclear material they could use to make a crude nuclear bomb. reported government studies said it's plausible if a sophisticated terrorist group got ahold of highly enriched uranium or plutonium, they could make a crude bomb that could incinerate the heart of a city.

the other is sabotage of nuclear facilities causing an accident like the fukushima we saw a few years ago. the third concern is getting ahold of radiological material used for beneficial purposes in hospitals, industrial sites and elsewhere, but if territories got it and spread over an area, they could cause panic, force us to evacuate several blocks of a city and could cause major economic disruption. probably wouldn't kill anybody beyond those killed by the explosives that might be used to disperse the radioactive material. >> sreenivasan: you rattled off hospitals, ac terchg institutions outside military facilities. is there any security standard that says let's protect all these things because they could be used in a dirty bomb? >> unfortunately, as i mentioned, we don't yet have a global rule that says if there is materials that could be used to make a nuclear weapon, it needs to be made secure. i think that's one thing we need to be working on in terms of get

ac political commitment among key states to implement key element of nuclear security for those things. i think we need a faster effort to do simple, fairly low-cost security for these radiological sources. things like making sure there is a security camera that sends a signal to the local police. making sure the machine where the source is embedded inside the huge machine is built so you can't take the source out without special equipment. >> let's talk about who was pt there. rust was absent at this. a lot of people are concerned russia has one of the largest stockpiles of nuclear material. >> russia has the world's largest stockpile of nuclear weapons and the material used to make nuclear weapons and is in the world's largest number of buildings and bunkers. to be fair, security in russia is dramatically improved compared to a quarter century ago, but there is still work to be done and, unfortunately, russia has cut off most of the

very useful cooperation that the united states and russia had on nuclear security and refused to participate in the fourth of the nuclear security summits. there are channels where the united states and russia are cooperating on these issues but we need to focus on building a different, more equal kind of cooperation between the united states and russia. we have a special responsibility of the countries with the biggest .stocks >> finally, i want to ask about india and pakistan. twhats level of -- what's the level of concern about nuclear security in those scunts countries? >> both countries take nuclear security seriously as russia, but they have a fast growing stockpile and terrorist in the same country in pakistan and that's serious concern. in india they have a serious terrorist threat, not as big in pakistan but quite serious.

so there's more to be done in both countries. but i would argue there is more to be done in pretty much every country where this material exists including in the united states. >> matthew bunn, thank you so much. >> thank you. >> woodruff: the fight for a $15 an hour minimum wage just netted its biggest victories yet this week. yesterday lawmakers in california voted for a bill that will raise the state's minimum wage to $15 by 2022. on monday, governor jerry brown is expected to sign it into law. last night, new york governor andrew cuomo said he reached a budget deal hiking the minimum to $15 in new york city by the end of 2018. suburbs and other parts of the state would reach that level in 2021. the combined moves could affect

as many as ten million workers. but there are continuing questions about whether that level of wage might have unintended consequences. we explore that with two who watch this closely with different political lenses: david cooper is with the economic policy institute; and douglas holtz-eakin is with the american action forum. and we welcome both of you to the program. david cooper to you first, you have been watching this issue for a long time but this has come about pretty suddenly, hasn't it? >> it has. i don't think anyone expected both states to move so quickly like this. of course, there had been talk in new york of being some sort of increase to 15. governor cuomo talked about it a few weeks ago and there were these ballots measures moving in california so we expected there to be some action on the minimum wage in both states but no one anticipated deals happening in the same week. >> woodruff: david cooper,

what difference do you think this will make? what do you see the tangible effects of this? >> we know some of the tangible effects. some people will get a raise and that's the good news part. the bad news is there is no new money to pay somebody $15 an hour, so the money has to come from somewhere, and one of the places it will come from is people who would have otherwise gotten hired and won't now. our estimate 7,000 people in california, 400,000 people in new york state. it seems odd to take money from someone who has a job to give it to someone who doesn't. that's part of the problem with minimum wage. >> woodruff: david cooper, yes, some people will get a raise but others will be hurt by this. >> i don't think that's necessarily true. the reality is our failure to raise minimum wages more appropriately in the last 40 years has left low-wage workers in this country earning less today than their counterparts a generation ago.

the bottom 30% makes less after adjusting for inflation than the same group of workers in the 1960s. over that time period, we had tremendous improvements to generate ability in businesses' profit-making potential but workers haven't been seeing the benefits because we haven't been raising minimum wages. >> woodruff: an element of basic fairness here? >> it's not the business community's job to deliver fairness, it's the government's job. one of the things wrong with the minimum wage is that, of the increases that come with going to $15, only 7% go to people in poverty. it's poorly targeted on those genuinely in need in the united states. there are better approaches, approaches that do not cost jobs, approaches that actually target people in poverty. they're the earne earned incomex credit and other subsidies. we should focus on pro work and targeted to those who have the biggest need. >> woodruff: what about, david cooper, the uneven nature of this, the fact as douglas holtz-eakin is referencing, for

some people this will be an appropriate boost, for others it won't either be enough but may be too much if you live in a community where this represents a giant increase. >> well, that's an interesting question. i actually agree with doug that it's government's role to enact policies that bring about fairness, but i would say the minimum wage is one of the policies government uses to achieve the outcomes. in terms of the size of the increase, every study that is looked at increases in the minimum wage concluded the group of low-wage workers makes more at the end of the day or at the end of the year than they would have otherwise. so set aside what these effects may be on employment because frankly these increases are large than what's been studied so i don't think we can say definitively what the effects may be but at the end of the day low-wage workers on the whole will make a lot more as a result of this increase. >> and why isn't that a good thing? >> if you're a low-wage worker that has a job or keeps a job, great, but why would you want to

endairnlg the others and not give them help when we have the tools to give them the help. california, $10 to $15 is a 50% increase, new york state, uncharted territory. both states acknowledged the reality of how risky this is for their workers because they've both put in essentially circuit breakers that say if we lose employment and retail sales, this is off. and i think that's an appropriate recognition of the danger of doing this too quickly and in such a dramatic way. >> woodruff: it is the case, david cooper, both states put in conditions, if you will, so that if you get along the road a certain distance and it isn't benefiting as it should, then they can undo some of this. >> yeah, and i think that's perfectly reasonable because these are both proposals and take us out of tex persons we've had in the last few decades in the united states at least at the national level. but these aren't bold compared to other countries and where

states have been in the united states before. in 1980 we had ten states the minimum wage level essentially the equivalent of what california is targeting. when you look at the ratio of what minimum wage working is being tad to the typical worker is being paid. other advanced countries like france have a comparable level now. the u.k. instituted the similar level in a few years and australia had a system level in the 1990s. it isn't like we're entering into a whole new area. >> woodruff: what about that? hat we've done to raise wages in the united states is have tight labor markets. the late '90s in the clintons would be the high mark. that's part of the recovery, we haven't seen the tight labor market. in the long term, if you have good productivity, if you have an economy with great growth potential, you can give higher wages without having to raise prices or hurt shareholds, that's the recipe for success.

nothing about racing the wage to 15 now and those are the problems we're having. >> woodruff: in some cases 10 to $15 an hour. >> if you look at a modest but decent standard of living in most cities in the united states, you're talking about somewhere around $15 an hour. if you look at where the federal minimum wage historically was, historically in the late 1960s, in terms of dollar value, it was the equivalent of about $10 an hour in today's dollars. if you phase in a minimum wage increase to get us back to at least where we were in the '60s and you're looking out four or five years, you've got to be setting a target somewhere in the rage of $11, $12, $13 to account for the fact that there is going to be inflation over a time period to eat away at the value. >> look forward. it means nothing to say this in 1960 and 1980. this is where we are. we have dramatic problems in the labor market that are a source of real pain to americans.

we need to get the productivity. where it sounds great to say we'll make $30,000 a year. the benefits is we'll target those not having an adequate standard of living. >> woodruff: the debate continues. we thank you both for joining us. douglas holtz-eakin, david cooper, we thank you. >> woodruff: stay with us. coming up on the newshour: mark shields and david brooks analyze the week in politics; and, british song artist lianne la havas talks about her music. but first, it's been a primary season with long lines, such as the ones at polling stations in arizona last week. and now the focus shifts to

wisconsin, where next tuesday's presidential primary will be its first statewide election with a new voter i.d. law in effect. john yang reports from milwaukee. >> reporter: in a driving rain, nefertiti helem and ernest barksdale headed to the department of motor vehicles in downtown milwaukee. neither nefertiti, who walks with a cane because she has lupus, nor ernest, her boyfriend, has a photo i.d. and they'll need one to vote in next week's presidential primary. starting this year, the path to the polling place for many wisconsin voters includes a stop at the d.m.v., which has severely cut its hours across the state. >> i need to obtain a voter i.d. >> reporter: they filled out forms, had their photos taken and waited to hear how they would fare-- --all with the help of community organizer anita johnson. wisconsin's strict, new voter requirement was signed into law

in 2011 by republican governor scott walker, part of a package of election law changes the republican-controlled legislature approved along party-lines. implementation was delayed by court challenges-- and a federal trial is scheduled for may. opponents say as many as 350,000 otherwise eligible voters could be disenfranchised-- most of them poor and people of color. neil albrecht heads up milwaukee's election commission, appointed by the city's mayor, a democrat. >> we've seen lawmakers change the hours and the number of days that early voting can occur, we've seen restrictions around voter registration and we've seen things like the voter i.d. law. all of those can have some effect on voter participation in an election. >> reporter: across the country, 16 states have new voting restrictions in place in this presidential election year.

wisconsin is one of ten states with tough voter i.d. laws. it allows only limited types of identification-- including a driver's license, state i.d. or passport. proponents say the new law prevents voter fraud. rick esenberg is president of the conservative wisconsin institute for law and liberty. >> we don't think it's unreasonable to take some precautions to assure people won't cheat. and i don't quite follow the argument that voting is the one area in life where no one will cheat. people cheat on their taxes, their spouses, they cheat in a variety of ways, and i don't know why voting would be something somehow immune from that human impulse. >> reporter: critics say voter fraud is rare. >> it's certainly not at a significant enough level to warrant something that will present such a significant barrier to voters.

i often hear the question, "well, how many cases of voter fraud are acceptable?", and my response to that question is "well, how many cases of disenfranchised voters who are not able to appear at their polling places on election day because of these barriers are acceptable?" >> i mean it's one thing to say that there are people who currently lack some form of identification, but what we're really concerned about are the people who cannot within reasonable effort obtain that identification and then became a person who otherwise would have voted and didn't. i don't think the bulk of the evidence suggest that there are a lot of people like that. >> reporter: but for some, getting that identification can be difficult. >> it should not be hard to exercise a fundamental right to vote. >> reporter: take the case of laura patten and what she went through with her 18-year-old daughter, mara. she was adopted from romania

when she was three. >> so i gathered the documents up and made a little check list, okay, i got the w2, i got the birth certificate, and off we went. >> reporter: but after three visits and a full day off work, the d.m.v. said it wasn't enough. >> i circled or checked all of the things i had, and i kept scratching my head thinking, "okay, i've got this. i showed you that." and it still didn't work. >> reporter: it should have. a d.m.v. official said mara should have gotten her i.d. on the first try. >> mara and her brother and sister are all adopted from romania. and so voting for us is obviously important as americans. for us and now these kids who so in our family, it's kind of a house rule-- you vote. you do. we can vote against each other too. but we definitely vote. >> reporter: alongside her older brother and sister, mara voted for the first time in february's

local primary. which takes us back to ernest and nefertiti's trip to the d.m.v. ernest had all his documents and got what he needed to vote on tuesday. but nefertiti will have to wait. >> it will take 14 days. >> i was a little upset, but you know, that's the law, so you know i'm not going to break the law just because i want to do something. so i can't really get upset, but yeah i am kind of disappointed because i did want to vote. >> reporter: nefertiti and ernest said even though the results were mixed, they couldn't have done this without the help of community organizer anita johnson. >> it's very intimidating. the only way most people get a chance to participate in democracy is by voting. you are stopping people-- this government is stopping people from participating in democracy.

>> reporter: election officials say they'll be watching closely on tuesday to see what the new law brings. for the pbs newshour, i'm john yang in milwaukee. >> woodruff: and now, for more on the run-up to next tuesday's primary showdown in wisconsin, and the rest of this week's news, we turn to the analysis of shields and brooks. that is syndicated columnist mark shields, and "new york times" columnist david brooks. so as we just heard in that report from john yang, some really, i guess, disturbing repercussions from the change in their voter i.d. law, and you can comment on that, but i also want to ask you about the fact that polls, david, are showing both frontrunners, hillary clinton and donald trump, running behind. what would it mean if they were to lose in wisconsin? >> they're frontrunners with amazing differences or disadvantages. in this stage, if you've won as

much as hillary clinton and donald trump has won, you're relaxed and cruising. not this time because they have significant weaknesses. hillary clinton, basic trust issues, the party is to the left. to me the big story this week is whether something with donald trump has shifted. we've been saying this for eight montes, and finally he's done it this time. i'm more dubious about the fact something's shifted but there's a more plausible argument that air's coming out of the balloon and that's because given what all he's won and what everybody including his wife is telling him, be more presidential, he can't control himself. not temperamentally with the attacks on everybody or with the abortion statements so he is a perpetual destabilizer at the moment when a lot of the party were able to submit to him, and he just can't behave in even a

modicum of presidentality and that could be leading to at this moment some second thoughts and genuine weakness. we'll know less now than in new york an eventually in california. >> woodruff: which is a few weeks away. but, mark, could this be a different moment in the republican primary for donald trump? >> sure, it could, judy. i think if bernie sanders wins wisconsin, it's fair to say it will have amounted to a vote against the democratic party establishment. if donald trump loses wisconsin, it will be a vote for the party establishment because the party establishment is just united ranks behind ted cruz, whom they can't stand, whom they don't like, but he has one compelling virtue. he's the only person who can beat donald trump. he's the only alternative. so if, in fact, the result achieves -- arrives as you

described it donald trump losing, it will have been a rejection of donald trump. there's no issue that's driving the cruz campaign. it's like ted cruz had a cathartic experience and became this compellingly gray garrous candidate and likable, it will be a vote against donald trump. i would pick up on one point, donald trump is criminally uncurious. >> woodruff: uncurious. uncurious. i mean, whether it's saying that, after the 1991 persian gulf war when the united states and the coalition drove saddam hussein's troops out of kuwait, that kuwait didn't contribute a nickel, kuwait contributed $60 million, maybe they should have contributed more. but it's not knowing the nuclear triad was air, sea and land. i mean, he's uncurious. i think it is a direct consequence of great wealth. having spent my life, early part of my life raising money

politically in campaigns, i found myself in the company of very rich people whose opinions were given apple polishing approval by the flatterers and sycophants in their court who went unchallenged and absolutely factually erroneous statements by including me who was just looking for money from them for my candidates and i really think this is it. no one told donald trump. donald trump never thought about the abortion issue. >> woodruff: the interview he did this week with chris matthews. >> with chris matthews, who was accredited with a determined job of interrogation. this is an issue with which america has been divided 43 years, nationally divided. america is pro-choice and anti-abortion. and he had no idea of the debates and i think this is the consequence. >> i would like to defend the intellectual curiosity of 1%. (laughter) i think it's unique to himself.

most of us, when we appear on television or even go to a job interview, you want to do some background preparation so you don't make a total fool of yourself, but he feels no compunctuation and his knowledge base is minuscule. we've seen it in every single interview. but there is consistency to donald trump. no alarm bells went off because he thinks a woman is weak. that bullying manner has been accepted by his voters because they think he's a bully on our behalf. whether they will continue to think that, i think probably, but some smart people will begin to feel a change. >> woodruff: what about that point, mark? could this be the turning point? his demise has been predicted repeatedly.

>> sure. >> woodruff: could this be different? >> it will be a game-changer, judy, in this sense -- it will remove one to have the essential building blocks of his stump speech which he spends the first third citing and reciting his wonderful poll numbers. how's he going to do that? he loves to talk about himself as the all-time winner and his components losers. how's he going to handle being a loser? i think in that sense it's going to be very revealing of how he handles it. no he's just shown any lack of graciousness or mag nimty. he's still attacking mitt romney. i mean, sort of abusing people. i don't know -- >> woodruff: but he still has more delegates than anybody else. >> yes. >> woodruff: he has won more votes than any other republican candidate. >> and there is a strong likelihood he will be severely damaged and the nominee, so that becomes a bit of a nightmare

scenario. whether this will hurt him is why people are voting for him. they're voting for him because nothing's changed in washington and no compromises are being done. there are some sympathetic reasons why people are voting for him and i've struggled this whole time to understand how much trump voters i want to blame for this. in some sense, i don't blame them at all. in some sense a lot of people are disaffected, they've had severe losses whether jobs, kids adrift, in some senses, they're sick of washington and nothing happening and we've had a front row seat to that for 15 years and wanted a change agent. some of those are sympathetic. the issues of how he treats the weak or people he perceives as weak, how he takes economic security and translates it into bigotry and m ma m misogny --

>> when our party wins, the voters are insightful and caring and when they lose probably stupid and racist to booed booth. maybe they're just rejecting us, or otherwise. i think in donald trump's favor. we're moving into an area of the country where ted cruz has limited if next to no appeal. ted cruz doesn't have a natural constituency in new york or connecticut or rhode island or pennsylvania -- maybe pennsylvania more. but, i mean, i just think that if trump can come back. but can he show -- i mean, his own family, apparently, tells him he has to be more presidential. >> woodruff: he talks about that when he's interviewed. he says my wife and my daughter are telling me to be more rptle but he says, i need to fight back. >> this is why cruz has no support in the northeast or california. that's why i think kasich should

stay in the race. there is a lot of people saying you should clear the deck to get a one on one race with cruz and trump but in the northeast cruz has no chance of stopping trump but at least kasich can draw some votes away from trump and prevent him. but unless a change of atmosphere, wounded, wounded, and the numbers of his general election get worse and worse but looking like the nominee. >> woodruff: we have to talk about the democrats, mark. hillary clinton showed a rare flash of anger yesterday. she was stopped by a protester after a speech who asked her about the charge by the bernie sanders camp that she is taking a lot of money from the fossil fuel industry, and she said they're lying. >> totally bogus charge against secretary clinton. open secrets records all contributions and the source thereof and the occupations of the donors reported. 15/100 of 1% of clinton's

campaign funds and pac funds as well have come from the fossil fuel industry. bernie sanders, 4/100 of 1% have come from people. so totally unfair. you can raise questions as to lobbyists and what else, and it was a legitimate reaction on her part. if bernie wins wisconsin, that will have been six out of seven of the contests he's won. >> woodruff: he's just won three caucuses. >> he's won everything since arizona. >> by the way, he stood by today when asked again about the fossil fuel contribution, he said we're telling the truth. >> it's inaccurate and unfair. it really is. i'm surprised the sanders campaign -- because they haven't done this in the past. >> woodruff: but david, on paper, hillary clinton is still the frontrunner, but bernie sanders raised, what, $45 million in the last month in march? >> yes. >> woodruff: he continues to build delegates, he may win

wisconsin. >> competitive in new york. >> woodruff: what is this headed for? >> headed for new york. she had a huge lead in new york a couple of weeks ago which has dwindled, now in double digits but if she loses the state where she was senator, that would change everything. sanders has a strong constituency, it's going to show up as coacts. wisconsin has a strong tradition going back 100 years, it's his place. so i don't think winning wisconsin necessarily turns him into a more credible campaign. >> i disagreement he was 50 points behind in wisconsin a year ago to secretary clinton. i mean, this is a victory. everybody's on the ballot in wisconsin. there is no democratic ballot, republican ballot. you can vote for ted cruz, bernie sanders, whatever. it's a significant, significant victory. if he does win, you know -- and make no mistake about it. >> woodruff: 30 seconds. hillary clinton keeps at it and

keeps letting him get under her skin? >> she's a paint by numbers democratic candidate with the same policy planks as every other democratic candidate, shown no creativity, no way to fill the void to what he offers. >> why do you want to be president of the united states other than something on your resume and i'm prepared for it. that's it. what is the vision? bernie sanders to his credit is the one candidate in the race with a message, you know, and it's a message that's energized an awful lot of people. >> woodruff: to be continued, mark shields, david brooks, thank you and have a great weekend. >> thank you. >> woodruff: the syrian army captured the city of palmyra this week, reclaiming it from isis, who took the city last year. its loss is a major setback to the militants. palmyra is also home to a

sprawling set of ancient roman ruins, some of which isis destroyed during its occupation. lindsey hilsum of independent television news, who visited the site today. >> reporter: palmyra's triumphal arch may have been demolished by the islamic state, but triumph is exactly what syrian soldiers feel. the officers know the symbolism of stones. "a people without a past," he says, "is a people without a future." no one knew the propaganda value of palmyra better than isis. they left the roman amphitheater intact because it made a dramatic backdrop for their videos of horror. imagine-- just last year, local men were forced to come and sit here and watch an extraordinary spectacle as 25 teenage jihadis came onto this ancient stage. with them, 25 syrian soldiers who they murdered.

a group of russian officers arrived, but they're camera shy even though it's their bombing that may have saved palmyra. towering above the sight looms a medieval citadel. this damage was caused by months of mortars and government bombardment. but it was only in the last few weeks when russian aircraft took to the skies with iranian and hezbollah fighters on the ground that the syrian army could prevail over the jihadis. >> ( translated ): there were many explosives and mines, and the heaviest battles were with terrorists around the castle. they had all kinds of weapons. as soon as we appeared, they fired everything at us. we killed many of them. >> reporter: before fleeing, islamic state militants rigged the streets of the modern town adjacent to the site with explosive devices and mines, the beauty of palmyra is stunning. syrian archeologists say they can rehabilitate the site in

five years if they get the money and if there can be peace. the current calm is more fragile than carving on stones. this is what the sacred sanctuary of the temple of bell used to look. tens of thousands of tourists flocked here to see it, and this is what it looks like now. the stones are shattered and some archeologists think it would not only be futile but wrong to try and rebuild it exactly how it was. >> 400 people have been killed inside the roman theater. people will not look at this site again as it was before. it's now a place where blood was shed. the ruins have blood on them and it's modern blood, it's not old blood. can we treat it the same way, as if this never happened before? >> reporter: the battle for palmyra has not only changed the course of this modern war but changed forever this precious ancient site.

>> woodruff: last year, british songwriter and singer lianne la havas was nominated for a grammy award. with a style that combines folk and soul, here's another installment in our series, "my music." have a listen. ♪ time to find a favorite story ♪ ♪ sad with the curtains closed ♪ watching an old cinema >> everyone's experience of love is completely unique to them, and yet so widely experienced by everyone. ♪ but honestly, i just write how i feel, and i try to figure out the essence of what i'm feeling, and that is normally the stronger part of the lyric. ♪ she's found on the brooklyn

bridge ♪ ♪ and she's truly at home >> my nammy name is lianne la h, and i'm a musician from london. ♪ ♪ there's a 30s in the her eyes and her heart ♪ >> pi mom's family are from jamaica, and we always wanted to go, so i went with her in 2014, and had an amazing time. it was very moving. ♪ it does the mirror world go on forever ♪ ♪ calm >> it's because my family are from there, but i had never seen it before. so that kind of inspired a lot of the content on the album. ♪ where am i gonna be if i'm ever 23 ♪ ♪ oh, i'm looking at life unfold ♪ ♪ dreaming of the green and gold ♪

♪ just like the ancient stone ♪ every sunrise i know ♪ those eyes you gave to me ♪ they let me see ♪ where i come from >> touring in the u.s. has been completely different than any other kind of touring. it's amazing. > ♪ all through the clear night sky ♪ >> you feel really appreciated. but i guess in the press more so regarding how they see me and what they would categorize my music as, i do find it interesting to be categorized, it feels like, by my race that r than what my music actually sounds like. you could say my singing style is perhaps like r&b in certain places or soul, which is fine.

♪ we are unstoppable >> but, in other places, it's not like that at all, and they just have these words that describe me based on skin color, whereas in england, you know, i'm just called mixed race or just lianne. ♪ we are unstoppable >> but over here i'm black and i guess i've never grown up being called black before. i also don't see why you have to call yourself anything, you know, or why you have to choose, because i'm just as much greek as i am jamaican. 50/50 exactly. ♪ we are unstoppable >> but i hope one day the way we

see race and the way we see being mixed and the way we categorize people's music will change because it's all closely related and it's something i find very interesting which i'm always, always talking about, always studying, always thinking about it. (applause) >> thank you. ♪ i'm looking at life unfold ♪ dreaming of the green and gold ♪ ♪ just like the ancient stone ♪ every sunrise i know >> woodruff: on the newshour online: the sunrises in the heart of australia's red center desert are breathtaking on their own, but lighting designer bruce munro has infused even more color in the landscape, with 50,000 solar lights that blanket the ground. his "field of light" installation opens today.

you can see a photo gallery of that, on our arts page. and on our podcast shortwave: how one libyan-american woman is fighting to free her family, whom she says is wrongly imprisoned in the united arab emirates. find a link to listen to that on our home page. and we get a first impression of driving in the newest tesla-- the model 3. hari spoke with "the verge" deputy editor chris ziegler, who got ride in one at the company's much-awaited launch. all that and more is on our web site, www.pbs.org/newshour. and tune in later this evening. on "washington week," gwen ifill and her panelists will have a breakdown of the week's big news. gwen? >> ifill: thanks, judy. tonight, we examine the donald trump dilemma-- popular in the primaries, but unpopular within the general population. how the trump phenomenon has changed everything: in wisconsin, for ted cruz, john kasich, hillary clinton, bernie sanders and voters at large.

for that, we turn to reporters from the "new york times," the "washington post," cnn and reuters. that's tonight on "washington week." judy? >> woodruff: and tomorrow's edition of pbs newshour weekend looks at the continuing iphone encryption battle as local prosecutors push to unlock phones that may hold clues to hundreds of crimes. >> at half past 10:00, someone knocked at prit any's apartment in baton rouge, louisiana and killed her. investigators noticed in the apartment right inside the front door on a living room table next to her keys and her purse was her cell phone and it was an iphone. with a warrant, baton rouge police obtained from brittany's cellular carrier, a list of who she called and texted but they couldn't get the content of those messages. do you think the answer to who did it is on your daughter's phone? >> oh, yes. do you think it's there? i think what's in that phone can lead them straight to the

person. >> woodruff: that's tomorrow night on pbs newshour "weekend." and we'll be back, right here, on monday, with a preview of the presidential primary races in wisconsin. that's the newshour for tonight. i'm judy woodruff. have a great weekend. thank you and good night. >> major funding for the pbs newshour has been provided by: >> fathom travel-- carnival corporation's small ship line. offering seven-day cruises to three cities in cuba. exploring the culture, cuisine and historic sites through its people. more at fathom.org. >> lincoln financial-- committed to helping you take charge of your financial future. >> bnsf railway. >> genentech.

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