captioning sponsored by cbs >> ninan: breaking news-- democrats elect a new leader. in a dramatic saturday afternoon vote, tom perez is chosen as the new national chair of the d.n.c. can he rebuild the party and make it win again? >> i know we can win the battles ahead. i know we will win the battles ahead. >> ninan: also tonight, our david martin reports from the front lines on the battle for mosul, the isis stronghold in iraq, as another journalist is killed there by a rhodes side bomb. an oscar-winning actress leadses a pre-oscar protest against the president. >> this is our time to resist. >> ninan: and a cbs news legend celebrates a major milestone. >> i got my money's worth on this trip to planet earth.

this is the "cbs weekend news." >> ninan: good evening. i'm reena ninan. he's the life of the party, and one that's recently shown few signs of life until today. democrats reached into president barack obama's cabinet and pulled out their new national party leader, former u.s. labor secretary, tom perez. hundreds of d.n.c. members gathered in atlanta for their most dramatic leadership vote since the 1980s. perez, the first latino chair of the d.n.c., is now in charge of rebuilding the party and turning opposition to president donald trump into votes for democrats. as for the president, he tweeted that he could not be happier for perez or for the republican party. here's tony dokoupil. >> pass your ballot in, please. >> reporter: the future of the democratic party came up for a vote on saturday. >> a united democratic party is not only our best hope. it is donald trump's worst

nightmare. >> reporter: and former labor secretary tom perez won the day. >> thank you so much. >> reporter: perez is now the new chair, narrowly defeating minnesota congressman keith ellison, a charismatic progressive in the second round of voting. . >> and the motion i would like to make to the body is the motion suspending the rules, if i may, to appoint keith ellison, deputy chair of the democratic national committee. ( cheers and applause ) >> reporter: in his first official act as chair, perez offered ellison the job of deputy, hoping to build a crucial alliance with ellison's younger, more activist wing. ellison accepted. >> we don't have the luxury, folks, to walk out of this room divided. ( applause ) we don't have that luxury. and i just want to say to you that it is my honor to serve this party under the chairmanship of tom perez. >> reporter: peres and ellison is taking over a democratic

party at its lowest point of power in 100 years. >> you want to give me a good sendoff, go vote? >> reporter: under president obama, other party lost about 1,000 state and federal elections, including 11 seats in the senate, 63 seats in the house, den ten governorships and, of course, the white house itself. the party's new leaders share a populist blueprint for rebuilding. the previous d.n.c. chair debbie wasserman schultz, resigned in scandal last summer after a trove of leaked emails suggested she had favored clinton over sanders in the democratic primaries. >> the party is nearly leaderless, and they need a leader. >> reporter: larry sabato is drerveght center for politics at the university of virginia. >> even if president trump is very unpopular in 2018, the republicans probably won't lose the senate and may, indeed, gain senate seats. >> reporter: and on the republican side, president trump recently appointed roona romney mcdaniel, niece of former presidential candidate, mom, as r.n.c. chair.

she replaced reince priebus, who now s, of course, the president's chief of staff. >> ninan: tony, we haven't heard much from president obama. i'm curious if he has weighed in. >> he has weighed in. he believes under perez and ellison the democrats will march ahead. >> ninan: president donald trump tweeted today he will not, attending the correspondents' dinner this april. he wrote: the tweet comes after a lunch today with republican governors of florida and wisconsin. here's errol barnett. >> reporter: after spending last weekend at his winter white house in florida, the president is expected to have a quiet weekend in washington. this morning, he started his day by boasting on twitter the national debt in my first month went down by $12 billion versus a $200 billion increase in obama's first month expect that he has, "great optimism for future of u.s. business and jobs." >> i love this place. ( cheers and applause )

love you people. >> reporter: friday was his much-anticipated address to the conservative political action conference. >> one by one, we're check off the promises we made to the people of the united states, one by one. a lot of promises. >> reporter: he also sharpened his attacks on the press. >> a few days ago i called the fake news the enemy of the people, and they are. they are the enemy of the people. >> reporter: later friday, several news organizations were excluded from an off-camera press briefing. >> reporter: in his weekly address, president trump attempted to bridge a divide, highlighting black history month and his plans to help minorities. >> we've lost a lot of our best jobs to other countries, and this has hurt the african

american community very badly. this week, i met with manufacturing c.e.o.s. we're going to be working on bring back those jobs, and i mean really good-paying jobs. >> reporter: tuesday night, president trump will address a joint session of congress. cbs news will carry it live. democrats, reena, who have opposed his immigration policies, have invited muslim americans, refugees and so-called dreamers to join them in the audience. >> ninan: and some of those democrats not sure they'll chaik the pretty hand. lots to watch. thanks, erring on. a kurdish tv reporter was killed today by a roadside bomb. 30-year-old sheefa ghurdi was a well-known war correspondent. you're electrocute her last report before she died. the tv channel she worked for praised her journallively and said her reporting broke stereotypes in a male-dom naipted profession. today, our david martin made it

to the outskirts of mosul, where iraqi forces, backed by the u.s. military, are slowly taking ground from isis. this past weekend, they retook the airport, and started pushing deeper into iraq's second-largest city. here's david's reporting from the front line. >> reporter: day seven battle for western mosul and the iraqis, by their own account, are moving very slowly. their operations are being disrupted by isis drones, sometimes operating in swarms of three to five. they are off-the-shelf quadrocopters which drop hand grenades or artillery shells and in this video releaseed by isis appeared to score a direct hoilt an iraqi pern carrier. hundreds escaped into the surrounding desert, but an estimated 700,00 700,000 remaind inside their homes. u.s. advisers are operating closer to the front lines in an attempt to hospital iraqis better coordinate their attacks. general joseph votel, commander of u.s. forces in the middle

east, independent the medevac helicopters and the field hospital set up to receive american casualties. but there haven't been any sense the battle for west mosul began. iraqi medevacs on the other hand, flew twiks missions on friday, signs of american support are everywhere. apache helicopter gunships wait for missions at a base 40 miles south of mosul, as do these mobile rocket launchers under the comoond of lieutenant mary floyd. what's the range of those rockets? >> so our rockets can go from 50 kilometers to 70 kilometers. >> reporter: so you're in range of mosul where we are now. >> we sure are. >> reporter: less than 10 miles south of mosul, american howitz rer on call 24/7. their mission is to suppress enemy fire. you get report backs on damage you've caused? >> we do. >> reporter: and in the words of the captain geoffrey ross, give the iraqiing the gumption to move forward. so in the time you've been here,

how many have you fired? >> circ i can't really discuss how many we've fired but it's considerably more than we thought we were going to shoot when we left fort hood. >> reporter: the iraqi strategy is to take back the city and deliver small bites. yesterday that cost them four dead and 53 wounded and an american officer says it's going to be hard every day. david martin, cbs news, south of mosul. >> ninan: a white house national security staffer resigned after eight days in the trump administration. the maryland woman is a muslim american whose family imgraipted from bangladesh. she was a holdover from the obama white house, who had hoped to stay. she told her story to jeff pegues. >> it was a very tense and unwelcoming feeling. >> reporter: rumana ahmed worked as a staffer on the national security council during want obama administration. when president trump took office, she decided to stay but quickly became uncomfortable. >> i got both of those looks of "oh, my god, look, are you okay,

you know, i'm surprised you're still here." but you also had others who who were very cold and ignored the fact i was there. >> reporter: she's hoping to change minds, even though as a muslim american woman she was offended by want president's rhetoric on the campaign trail. >> at the end of the day you might not convince everybody but there might be one or two people willing to listen. >> reporter: did you jins be of convince anybody over there? >> there was no opportunity to interact with anybody. >> reporter: in the chaotic early days, ahmed believes she and other staffers were often cut out of the policy-make process. >> you kind of actually found out about things as they came out in the news, and that wasn't just true of some of us who stayed, but it was also true of some of the trump staffers as well. >> no hate, no fear! immigrants are welcome here! >> reporter: ahmed says one of the last straws for her was the president's executive order banning travel from seven predominantly-muslim countries.

less than two weeks into the trump presidency, she quit. what did you say? >> walking into that building was becoming more and more difficult every single day because everything that administration was doing stood against for what i stood for as both an american and a muslim. >> reporter: there has been a lot of turmoil on the national security council. just this past week, president trump named h.r. mcmaster to replace michael flynn as national security adviser. white house officials did not have a lot to stay about miss october meld's comments, theenl they wish her well. jeff pegues, cbs news, washington. >> ninan: the u.s. customs and border protection agency gave an update yesterday on president trump's proposed border wall with mexico. the agency says it will begin accepting construction bids early next month and in april will begin awarding contracts to build the wall. the president also wants to hire another 5,000 border patrol agents. but for now, local law enforcement agencies are being asked to help grld the border. carter evans shows us how all this is playing out in arizona.

>> reporter: it happened suddenly. a man desperate for help in the harsh arizona desert. ( speak spanish ). >> okay. >> reporter: after he got some water from pima county sheriff's deputy karl woolridge, we learned that 24-year-old jesus gonsalez had been wandering for four days after crossing the border from mexico 60 miles away. is this unusual? >> not at all. >> reporter: now the department of homeland security would like local officers like deputy woolridge to voluntarily tyke a new role so they can act as immigration officers. if you had to put those people in your jails, would there be enough room? >> no, we're right there at capacity. we don't have the manpower to really get into immigration enforcement. >> reporter: even though jesus may have broken a federal law-- >> that's not a problem for a local sheriff. my responsibility is public safety in this county. that's my responsibility. >> reporter: pima county's newly elected republican sheriff mark napier has 500 sworn

officers who protect roughly 1 million residents across 9,000 square miles along want southern border. if your deputies are viewed as immigration enforcers, how does that impact their ability to do their job? >> we wouldn't get a lot of calls that we get. i mean, where people witness crimes or are victims of crime, out of fear that that would lead to deportation. >> reporter: so deputy woolridge didn't detain jesus. instead, he called a nearby border patrol agent who took him into custody. what happens now? >> i really don't know. >> reporter: this is where your job end. >> this is it. >> reporter: the sheriff here welcomes want president's plan to immediately hire 5,000 border patrol agents because, reena, he says he's needs the federal help. >> ninan: carter evans, thank you. coming up, a pre-oscar awards party turns into a protest against the president's travel ban.

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awars, but jamie yuccas tells us about a group of actors who on friday turned a pre-oscar event into a political protest. >> reporter: not long after the oscar red carpet was unfurled in hollywood, another gathering down the street on friday brought out slebilities with politics on their mind. >> this is our time to resist. ( cheers and applause ) >> reporter: around 1,000 people rallied in beverly hills outside the headquarters of hollywood power broker united talent agency. they railed against president trump's proposed travel restrictions on seven muslim-majority countries. >> i send you my warmest regards from tehran. >> reporter: one of those most impacted by the proposed ban, oscar-winning iranian filmmaker asghar farhadi sent a message from iran. he decided to boycott sunday's ceremony in protest, even though he's again nominated for best foreign language film this year. >> i hope the unity will

continue and spread to defy other injustices ♪ keep on hoping >> reporter: the event was sponsored by u.t.a., as a substitute for its traditional pre-oscar party held each year during the movie industry's most glamulous weekend. >> with what's going on in the world, isn't this a time to take movie our resources and our time and our influence and talk about what's going on in the world? >> reporter: along with all the talk of civil rights and artistic expression, the event was an attempt to grab the world's attention on the one weekend its collective gays is focused on hollywood. >> let's get out there, let's makes some noise, throw our arms around our very own community, and show the world what we're made of. >> reporter: jamie yuccas, cbs news. >> ninan: well, still ahead on "48 hours investigates," the horrors of stalking and tells us how a cbs star is fighting to save lives.

we danced in a german dance group. i wore lederhosen.man. when i first got on ancestry i was really surprised that i wasn't finding all of these germans in my tree. i decided to have my dna tested through ancestry dna. the big surprise was we're not german at all. 52% of my dna comes from scotland and ireland.

so, i traded in my lederhosen for a kilt. ancestry has many paths to discovering your story. get started for free at ancestry.com. >> ninan: an estimated 7.5 million men and women are stalked each year, and that only accounts for the reported cases. many victims are hesitant to speak out and bring their stalk tore justice. according to actress pauley perrette from the cbs crime drama "n.c.i.s.," the laws have to change. "48 hours" correspondent erin moriarty investigates. ♪ ♪ >> reporter: the career of 22-year-old singing sensation christina grimmie was exploding.

>> really like this song. >> reporter: from youtube performances to the big time ♪ i came in like a wrecking... >> reporter: tv's "the voice,," to concert tours. >> you griez awesome! >> reporter: and then in 2016, the promising star, while welcoming fans at a meet-and-greet, was shot dead, the victim of an obsessed fan, a stalker. >> she had a stalker in the sense of the modern age that we live in of celebrities having to put themselves out on social media. >> reporter: orlando police detective michael moreschi: >> she had no clue that this man was stalking her over the internet or that she was in any danger at all. >> thanks for listening! >> that poor girl with her arms wide open, just heartbreaking. >> reporter: do you feel that could be you? >> i think every victim feels like that-- that it could be us. >> reporter: actress pauley perrette from the cbs show

"n.c.i.s." says she has been stalked for more than a decade and has found law enforcement sometimes slow to help, although her stalker has never explicitly threatened her life, she fears what could happen next. . >> i'm so scared sitting here talking about it. but we can't keep this a secret. we have to get these laws changed. i-- i'm here for other victims. >> reporter: when it comes to stalking, celebrities get most of the attention, but the majority of cases involve everyday people stalked by someone they know. >> being stalked is like being a prisoner, and it doesn't end. >> reporter: peggy is a lawyer and a single mother. her stalker is a man she dated briefly. after the relationship ended, she began sending her increasingly disturbing emails and voice mails. >> i'm going to dedicate my whole (bleep) life to wrecking yours! >> he decide descroid everything. >> after christina grimmie was

murdered, it really hit home for me that, that could be my reality. >> and this is basically the problem. >> reporter: six years ago lenora claire, a casting director, met her stalker, justin massler. >> a lot of people are asking me, since you're jesus christ-- >> reporter: he had a history, having been arrested in 2010, for stalking ivanka trump. lenora says that although she empty justin just once, the havoc he wreaked on her life was ongoing. >> lenora does not want me to stop contacting her. >> i shouldn't be fearful any time get a knock at my door, but i am. it's just will he find me? >> reporter: you can see erin's chilling report in a special two-hour edition of "48 hours," tonight right here on cbs. up next, a shoutout to cbs news birthday boy, bob schieffer. ...and kept my town moving.

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awww. try this. for minor arthritis pain, only aleve is fda approved to work for up to 12 straight hours with just one pill. thank you. come on everybody. aleve. live whole. not part. wishing a beloved member of the cbs news family a very happy birthday. bob schieffer, renowned broadcast journalist, political commentator, author, cancer survivor, and bona fide living legend, according to the library of congress. today, bob earned another distinguished title-- octogenarian. >> good evening. >> ninan: for more than half of his 80 years, bob schieffer worked at cbs news, covering major events, including j.f.k.'s assassination, the vietnam war-- >> there are so many people from this area who are in vietnam. personally, i'm thrilled to

death that i'm a newspaper exprrpt this is the name of the game. >> reporter: every political convention since 1968, and 14 presidential inaugurations. >> today marks my official debut, as it were, as moderator of "face the nation." >> ninan: he anchored "face the nation" for 24 years, in addition to anchoring week day and weekend broadcasts of the cbs evening news. >> and that's it for us today as i say gone for this last time. >> reporter: schieffer retired in 2015, but he still shares his insights with us as a political contributor. tonight, all of us at cbs news hope he's enjoying a agreement birthday celebration. and this must be the year of the milestone for bob. he celebrates another one on april 15, his 50th wedding anniversary with his wife, patricia. and that's the "cbs weekend news" for this saturday. there's more news right now on our 24-hour streaming channel cbsn at cbsnews.com. i'm reena ninan in new york. thanks for joining us, and good night.

♪ oscar host jimmy kimmel reveals his surprises for hollywood's biggest night. >> it could be a disaster. >> everything you don't know about the academy awards. >> it's big. >> then george clooney's fatherhood fears at 55. >> baby crying like [ crying ] it's going to change a lot of things. >> his first red carpet with a pregnant amal and first interview about their twins on the way. plus angelina jolie breaks her silence on her divorce drama. does she still think brad is a good dad? then mariah carey gives us the reel scoop on her new romance. >> what exactly do you want to know? >> they say they're a couple. why her ex nick cannon isn't buying it. >> then behind the scenes of a new