>> jonathan karl leading us off tonight. jon, thank you. >>> now, to the democratic side tonight, and to a report today in "the new york times" that president obama met with donors and suggested it might be time for bernie sanders' campaign to wind down, and for the party to unite behind hillary clinton. but today, the white house said, not so fast, clarifying what the president did say. abc's cecilia vega on the campaign tonight. >> reporter: tonight, is a possible turning point coming in the race? "the new york times" reporting president obama told a group of democratic donors it will soon be time for bernie sanders' campaign to end, and for democrats to unite behind hillary clinton. today, the white house denying the president was endorsing clinton, but adding, he did say >> our success in november, in electing a democratic president will depend on the commitment and ability of the democratic party to come together behind our nominee. >> reporter: if that's hillary clinton, it will be full circle for two people who once b

i fear this could actually get worse. >> jonathan karl reporting for us. >>> another story that we're following overnight. a young maryland police officer is dead in what officials say is an unprovoked ambush attack. the suspected shooter was then wounded in a shootout with cops. his brother was later arrested. . the motive for the shooting is unknown. the officer would have turned 29 this week. >> the community needs to know that one of your defenders has been lost. >> he was important to his family. he's important to this entire community. we have another mother tonight who's without her son. >> police say they had no contact with the suspect before he opened fire. he's currently in the hospital with nonlife threatening injuries. >>> overseas now, where terror attack in the capital of turkey. police suspect that kurdish militants carried out the attack which the main boulevard of ankara. the turkish prime minister promising to bring terrorism to its knees. >>> now, al qaeda's north africa affiliate is claiming responsibility in an attack on a popular beach resort. the gunmen stormed

abc's jonathan karl has more. >> reporter: donald trump is standing by his embattled campaign manager. >> and i know it would be very easy for me to discard people. i don't discard people. i stay with people. >> reporter: it comes after police released that new video taken from an overhead security camera at trump's own golf club. there's trump, making his way through the crowd. reporter michelle fields by his side, in the light colored jacket. campaign manager corey lewandowski right behind him. now watch as fields tries to ask a question, lewandowski moves forward, appearing to grab her and pull her back, away from trump. look closer as lewandowski reaches for the reporter, gripping her arm. behind. i caught myself and i didn't fall to the floor. i mean it felt like it was a huge force, like the person was trying to get me on the ground. >> reporter: the campaign manager called fields "delusional" and insisted he never touched her, that he never even met her. and shortly after the incident trump himself seemed to agree. >> the secret service was surrounding everybody. they said noth

more now from jonathan karl. >> reporter: in wisconsin, new line on abortion. at an msnbc forum, he was asked if women who get abortions should be punished if it's made illegal. he said this -- >> do you believe in punishment for abortion, yes or no, as a principle? >> the answer is that there has to be some form of punishment. >> for the woman? >> yeah, there has to be some form. >> ten cents, ten years, what? >> i don't know. that i don't know. that i don't know. >> well, why not? >> i don't know. because -- >> you take positions on everything else. >> frankly -- i do take positions on everything else. it's a very complicated position. >> reporter: asked if there should be punishment for the man involved, trump said no. hillary clinton responded immediately, tweeting, "just when you thought it couldn't get worse. horrific and telling." >> reporter: trump's republican rivals, both of whom oppose abortion rights, rejected the idea of punishing women who have abortions. and just three hours after his controversial statements, trump reversed himself completely, s

. >> abc's jonathan karl takes a closer look at the political turmoil and what he's witnessing on the campaign trail. >> it's hard to look at what's happening now and not think of those images from chicago in 1968, when you had violent clashes on the street. i have been to trump rallies all over the country and it's important to say that the supporters are entirely peaceful. peaceful. but i have never seen the situation where you have a candidate from the podium encouraging even condoning violence as these protests grow bigger, grow more fervent. i fear this could actually get worse. >> jonathan karl reporting for us. >>> we want to get to another story that we're following overnight. a young maryland police officer is dead in what officials say is an unprovoked ambush attack. he was shot outside of prince georges county police station. the suspected shooter was then wounded in a shootout with cops. his brother was later arrested. the motive for the shooting is unknown. the officer would have turned 29 this week. >> the community needs to know that one of your defenders has been lost.

abc's jonathan karl in cuba spoke to some of those protesters. >> reporter: at their extraordinary press conference in havana, president obama and cuban president raul castro sparred over human rights. president castro denied that cuba has any political prisoners whatsoever. but just sunday, 50 demonstrators were arrested, most of them women, as they tried to hold a silent protest just about three miles from this spot. and i met on the outskirts of havana with a group of three cuban dissidents who will all be meeting with president obama. they told me that cuba, the human rights situation here has actually gotten worse. in fact, they showed me a list of 304 people who have been arrested just over the past few days. all around cuba. about 104 of them in the havana area all in advance o president's trip. they told me they look forward to meeting with president obama, a hugely important symbolic meeting because they will take photos of that meeting, they'll want to distribute those photos and say they send a message to other political dissidents in this country that they are not alone. thei

jonathan karl, abc news, washington. >> more politics now. we've heard from senator marco rubio for the first time since he suspended his campaign on tuesday night. rubio went home to miami after taking care of some business in d.c. before leaving the capital, he ma talked about his plans, which he said do not include most government positions. >> i'm not interested in being vice president. i don't mean that in a disrespectful way. i'm going to be vice president. i'm not running for governor of florida. i'm going to finish my term in the senate over the next ten it remains unclear exactly what rubio will do. he says he also did not make an endorsement among the republican contenders although he did say he believes ted cruz is a conservative and that he liked john kasich. >> the u.s. is now accusing isis of committing genocide. secretary of state john kerry said the terror group is responsible for genocide against christians and other muslim groups flps iraq and syria. many are forced to convert to islam or be killed. the announcement is not e

abc's chief white house correspondent jonathan karl standing by with us tonight at the super tuesday wall, and jon, first of all, for the republicans, you've got the map what are you watching on that side? >> reporter: well, the biggest thing to watch is the state of texas. the single biggest delegate prize tonight. 155 delegates. that's ted cruz's home state. he absolutely must win there. but it is also an essential state for marco rubio. if he falls below 20%, he can be shut out and not get a single degas de delegate out of texas. they have to find somewhere else to beat trump. the best prospects for that will be somewhere in the south, for ted cruz, he's predicated his south. for marco rubio, he's worked virginia, campaigned there in the final days. minnesota. the only state on here, david, that donald trump did not even visit. so, that's the look on the republican side. of texas, we'll be watching for all the republican candidates there. meantime, on the democratic side, jon, what are you watching? >> reporter: well, the democratic side, bernie sanders can't afford to watch hilla

abc's chief white house correspondndt jonathan karl on the backlash and on the claims that trump has now been hacked. >> reporter: donald trump w w denounced today by republican leaders in washington and ohio for predicting riots if he loses the nomination this summer at the convention in believe land. >> i think you'd have riots. i think you'd have riots. i'm representing a trendous, many, many millions of people. i think you would have problems like you've never seen before. would happen. i really do. i believe that. i wouldn't lead it, but i think bad things would happen. >> reporter: unacceptable, said speakeof the house paul ryan. >> nobody should say such things, in my opinion, because, to even address or hint to violence is unacceptable. >> reporter: and ohio governor john kasich, who is both running against trump and hosting this summer's convention, told abc news trump's caulktalk is dangerous. >> to even imply that there could be violence if he doesn't get his way, you know, he's not running for the presidency of the wwe, he's running for president of the united states. and

abc's jonathan karl with the video, what trump originally said, and then his statement just hours later. >> reporter: today in wisconsin, donald trump staked out a hard new line on abortion. at an nsnbc forum, he was asked if women who get abortions should be punished, if it's made illegal. >> do you believe in punishment for abortion, yes or no, as a principle? >> the answer is that there has to be some form of punishment. >> for the woman? >> yeah, there has to be some form. >> ten cents, ten years, what? >> i don't know. that i don't know. that i don't know. >> well, why not? >> i don't know. because -- >> you take positions on everything else. >> frankly, i do take positions on everything else. it's a very complicated position. >> reporter: asked if there should be punishment for the man involved, trump said no. hillary clinton responded immediately, tweeting, "just when you thought it couldn't get worse. horrific and telling." >> reporter: trump's republican rivals, both of whom oppose abortion rights, today rejected the idea of punishing women who have abortions. and tonight, just

jonathan karl, abc news washington. ordered theÁcountry nuclear arsenalxp to be at the readyañ.eanfoet media citingh h koreabsay the leader ordered military to be ready for preemptivejñ strike. comes one day after the u.s. securityv council approved sanction agaisá north korea. >> one of america best known soccer star is making headlinesé tonight. san joseeukp brandi chastain4bl cte you have heard because of what% star  known for the celebratio) at thece world cup;q coming fod of the sport. 47-year-old brandi changes taper brain to search on cte degenerative brain disease linked to concussion. >> she's such an iconic figure for a big chunkj of our county not really focused on the concussion issue. >>reporter: as college player chastain did suffer from two concussions. now a mom and soccer cuomo coach is concerned about the damage all the header may have caused. >>o4 she is having the symptom and living a normal life but she's so well aware of what could be awaiting her. >>reporter: chastain telling usa today but as you grow older you sometimes say gosh, am i losing my memo

jonathan karl. >> a jury found brock turner guilty on all three counts of felony sexual assault. two bicyclist saw trner on top of an unconscious woman on the ground in january of last year. he testified the sex was consensual. turner was charged with assault with intent to commit rape and two other felonies. turner will be sentenced june 2nd. >>> an elderly and disabled tenant in san francisco's valley is being effectvicted and tells7 news tonight she's not going without a fight. here is abc 7 news reporter vic lee. >> we made the decision to fight it. >> reporter: beatrice alan lived here for almost her entire life and in this apartment for more than three decades. the 80-year-old has suffered three strokes now she's being evicted by a new owner. >> i feel really sad because i have been here for 35 years. >> reporter: alan's daughter betty rose lives with her. >> there is no need for you to do this. you have so much, just let my mother finish staying here. >> reporter: the new landlord is a technology investor who also owns his own firm. he and his wife live in this house next

jonathan karl has more. >> ted cruz in wisconsin today. >> thank you both for your support. this is the state where he will stop donald trum trump. >> item neck and neck and together we are going to win. >>reporter: dropping in on the lunch crowd at the altuna family restaurant cruz unloaded on trump. >> he yells and screams and occurs and attackixs people and threatens lawsuit and attack their wives and attack their family. >>reporter: trump got earful from one of talk radio host a cruz supporter after trump defened his attack on cruz wife heidi saying that cruz started the war over wives something the senator denies. >> i didn't start it he started it. if he didn't start it it would have never happened. nothing like this would have ever happened. >> we are not on a play ground we are running for president of the united states. >> i agree with that 100 percent and my views are not playground view. >>reporter: the twitter attack on cruz wife? we asked trump if he would do that kind of thing as president of the united states. >> would you be doing late night twitter wars wit

and let's go to jonathan karl. let's go back to 2009, because there's a story behind this image? >> their relationship actually got off to an awkward start, when president obama seemed to dis her by mentioning her use of an astrologer, and had to apologize later. buthey later found common cause. you see them linking arms after joining together to favor federal fding for stem cell research. it was a really big deal, because it was something that were opposed to. >> in the meantime, the outpouring from other first families as well, the bushes and clintons. >> yes, we had a tweet from hillary clinton, saying ncy's legendary. and from the bushes, george w and his wife, her devotion to her husbandnd was only matched to that for our country. >> jon, thanks. >>> still ahead, donald trump and new momentum for ted cruz. the wins this weekend. >>> and wild storms slamming the country. the storm system on the move. it's not over t. >>> and breaking news. plant trying to get a fire under control. >>> and we continue remembering nancy reagan. our special edition of "world news tonight" return

cell phone information and address. >> that was jonathan karl reporting. dozens of are eye are planning to boycott a donald trump speech in new york. he will be speaking to the largely east pro is real lobbying group and his pledge to stay newt rag between israel and palestine. >> democratic presidential candidate sanders conceded missouri primary to opponent. hillary clinton picks up two more delegates. sorority results extremely close but sanders said inform reason to show a recount. he said he would prefer to save the missouri taxpayer some money. republican race in missouri remains too close to call between donald trump and ted cruz. >>> fbi is releasing new information tonight about the santa clara man accused of stabbing 4 people at merced last september. 18-year-old mohammad felt radicalize and felt no tie to co-conspirator or foreign terrorist organization. mohammad lap top had pro isis propaganda an he visited isis and other extremist web sites prior to the attack. >> now to the capture of young american accused of fighting for isis. 26 year old w