welcome to "world news tonight." a big victory and a big name, calling it quits. the new look of the presidential race tonight. trump takeover. the billionaire businessman, winning in south carolina. his second primary in a row. >> when you win, it's beautiful. >> can he be stopped? the heated battle for second place. cooling the bern. hillary clinton taking the momentum back from bernie sanders. >> is this a great night or what? >> sanders vowing to go on. >> one of the great political upsets in the history of the united states. shooting spree. the deadly rampage, terrorizing a city. an uber driver under arrest. tonight, the hunt for a motive. and, mountain emergencies.

when the lift cable snaps. dozens of others trapped for hours. the little boy that slipped off the chair. the hidden danger before you even hit the slopes. good evening. thanks for joining us on this sunday. i'm tom llamas. we begin with the campaign for the presidency. looking different for both parties tonight. donald trump, victorious in the south carolina party. his whole family there to celebrate with him. the win by double digits. but the fight for second place came down to just over 1,000 votes. marco rubio edging out ted cruz. and any hope of another bush presidency now over. jeb bowing out. here's jonathan karl. >> we had such an amazing victory yesterday, incredible. >> reporter: donald trump is now unmistakably on top.

people just won. >> reporter: he was on such a high after winning in south carolina, he briefly turned the mike over to his wife melania. >> he will be the best president. >> reporter: and his very pregnant daughter ivanka. >> the momentum since the beginning of this campaign has been unbelievable. >> reporter: it was a clean sweep, scoring all 50 of the state's delegates. he even came out on top for evangelical voters. >> i didn't know i was going to win by that much. it was record-setting stuff. >> reporter: with jeb bush calling it quits, the battle senators are up against each other. while both were beaten badly by trump, rubio sees reason for hope. over 70% of republicans have said, we're not voting for donald trump. >> reporter: donald trump continues to say cruz is

because he was born in canada. and today on "this week" george pressed him on something he retweeted that suggested that rubio is also ineligible. >> you're really not sure? >> i've never looked at it. honestly, i've never looked at it. somebody said he's not, we retweeted it, we started a dialogue and it's very interesting. >> reporter: rubio laughed it off. >> with just heard donald trump say he's not sure you're eligible to run for president. your response? >> well, this is, look, this is a pattern, a game he plays. i'm going to spend zero time on his interpretation of the constitution, with regard to eligibility. >> reporter: trump has a chance to show more momentum in just two days. the latest polls in nevada show trump with a big lead.

matt dowd. does trump now need a strategic game plan? >> he has a better gut sense of campaigner. donald trump needs to keep winning, because winning begets winning. and momentum at this point is more important than anything else. he needs to start using language that consolidates the party, second, stop with the insults. and spend a little time preparing for the debate. >> we'll see if he changes. thank you. and hillary clinton, holding off bernie sanders in the nevada

med meetd immediately moving on. celebrating at a rally in houston. her margin of victory was a slim one, but included big support from african-american voters. here's mary bruce. >> we just won nevada! >> reporter: hillary clinton is relishing her nevada win and looking ahead. >> hello, houston! is this a great night or what. >> reporter: celebrating with a late-night rally in texas. >> victory is nigh. >> reporter: her campaign is confident, they see a clear path to the nomination. clinton held off bernie sanders' late rise to take nevada by five points. >> thank you very much. thanks for coming out. >> reporter: sanders, enjoying a strong second finish. >> you know, five weeks ago, we were 25 points behind in the polls. >> reporter: but the candidates today argued over who won the key latino vote. >> as i understand it, we won

is a big breakthrough for us. analysis shows. huge support from african-americans. whose vote will be critical in the next big contest in this south carolina. as she discussed with b.e.t. who's the african-american voter that your campaign is targeting? >> as many as possible. >> of course. >> reporter: sanders, with stops in south carolina. >> we need your help. to help lead this country in a political revolution. >> reporter: tonight, joined by danny glover in his biggest event in the state so far. the clinton campaign is happy with the win here. but acknowledges not every state looks or votes like this one. they fully expect sanders to win some states on tuesday. tom? >> mary, thank you. we move on to a shooting spree in michigan.

police arresting this man with no criminal record, but is an uber driver. here's alex perez. >> reporter: tonight, investigators in a kalamazoo, michigan, on the hunt. after a deadly rampage leaves six dead. the suspect, jason dalton, now behind bars. the chaos beginning at 5:42 p.m. saturday. a woman shot, but she survives. four hours later, in this parking lot, a father and his son shot and killed. within minutes, the gunman opens fire outside a cracker barrel restaurant. killing four in their car. including a former teacher, and critically wounding a 14-year-old girl. >> dispatch all units. suspect vehicle in a shooting. >> reporter: just after midnight, police spot the suspect's vehicle and take him into custody. without incident. the victims, police say,

how do you go and tell the families of these victims that they weren't targeted for any reason other than they were there to be a target? >> reporter: 45-year-old dalton had no criminal record, and worked as an uber driver. his neighbors, in disbelief. >> it's scary. that could have been us, my daughter that got killed. >> reporter: tonight, authorities investigating on whether the alleged gunman was taking fares between shootings. matt melon claims he was dalton's passenger just 45 minutes before the first shooting. >> we were driving through medians, driving through the we were speeding along, once he came to a stop, i jumped out and ran away.

saying we're horrified and heartbroken. we've reached out to the police to help in any way that we can. investigators recovered a gun from dalton's vehicle. he is expected in court tomorrow afternoon. >> thank you. overseas, isis taking responsibility for bombings in the city of homs. as jennifer eccleston reports, the attacks come as john kerry announced progress toward a cease fire. >> reporter: terror struck in quick succession in the syrian capital. isis said its fighters, with suicide vests and a car bomb were responsible.

damascus, home to one of shia's most holy shrines. here, too, a neighborhood dominated by minorities within islam. those reviled by the sunnyi radicals within the islamic state. and this, as news between rebel fighters and syria's government. syria. storms to ever hit in fiji, after cyclone winston hit. miles per hour. the cyrfew extended through monday.

high-stakes twist in bill cosby's legal drama. tonight, the cosbys' lawyer firing an emergency motion to spare his wife. linsey davis with the latest. >> reporter: tonight, camille cosby is fighting back. filing this motion to postpone her deposition tomorrow at a massachusetts hotel. his wife of 52 years has been hoping to avoid answering any questions, citing marital privilege. she served as his business manager for years. but mrs. cosby says her public testimony would create an

>> no wife wants to go into a deposition or public forum and have to testify about her personal relationship with her husband. definitely not testify about his relationships with other women. >> reporter: more than 50 women have forward. through it all, camille cosby is standing by his side. saying, he is the man you thought you knew. she still has the right to claim mareital privilege. next, to the damage to roads, like this one in pennsylvania.

year fixing the damage to vehicles. gloria riviera has the story. >> reporter: they are the craters on your commute, causing serious damage. tonight, cities are scrambling to fix the seemingly endless pothole epidemic. roller-coaster temperatures in part to blame. the freeze/thaw effect causing ruptures, especially in older roads. and in the last five years, 16 million drivers suffering damage, on average paying $300 to fix it. cars coming in for alignment repairs, and even axle damage. >> we fill them, and sometimes

>> reporter: you can't fill them fast enough. >> can not. >> reporter: if you do hit a pothole, you may be able to be reimbursed. if you were on a local or state road, reach out and document everything. >> thank you. still ahead, when the slopes turn dangerous. a little boy dangling from a chair lift. how to stay safe before you hit the mountain. plus, the nasa moon secret revealed. we'll play for you the mysterious sound astronauts heard as they circled the moon. nasa still has no idea what it is. but with my back pain i couldn't sleep... so i couldn't get up in time. then i found aleve pm. aleve pm is theonly one to combine a safe sleep aidplus the 12-hour

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as you make your way up to the mountain. here's clayton sandell. >> reporter: for more than six minutes, this 11-year-old boy dangles from a chair lift. he tried to catch his ski pole. then the dramatic moment, rescuers holding out a tarp, and urging him to let go. he was not hurt. there are roughly 3,500 ski lifts in the united states. accidents are rare, but ski resorts are reminding people how to stay safe. >> you think you're going to drop something, it's best just to let it drop. and then somebody can go back around and pick it up for you. >> reporter: but sometimes there are mechanical failures, like yesterday in west virginia. 25 people fell when the lift derailed. dropping 30 feet. 100 skiers delayed. rescuers using harnesses to

attention for minor injuries. the timberline four seasons resort saying all lifts undergo rigorous inspection. and are in compliance with safety standards. clayton sandell, abc news, denver. >> thank you. when we come back, the pope's plea to world leaders. what he's urging them to do tonight. will they take action? and the dramatic rescue at sea. and a wild finish at daytona. almost too close to call.

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finally tonight, in the middle of a grocery store aisle, one man's heart started to give out. complete strangers jumped into action. but it turned out, they were not all strangers. here's john donvan. >> i was really going. >> reporter: michael kitty knows he very nearly died today. he collapsed here, he was stocking shelves when his heart stopped. >> he's not breathing. a young man is trying to help. >> reporter: this high school student was in the store and rushed over. he started administering cpr. >> i checked his respirations and his pulse. we didn't have anything. >> reporter: two nurses jumped into the rescue. >> he was laid on the floor, purple. and he didn't have in pulse.

fire department got the call. >> cpr in progress. cardiac arrest. >> reporter: including this man, who didn't realize at first, that the life they were trying to save was his dad's. in the rush, he didn't get a good look at the face under the oxygen mask. >> it's a different experience when you realize it's a family member. >> reporter: well, you know how it ends because you've met michael kitty. and he's out of the hospital, and thanking everyone that had a part. those that did their job, and those that just happened by and jumped in. john donvan, abc news, washington. >> thank you. "gma" first thing in the morning, david muir will be right back here tomorrow night. i'm tom llamas in new york.

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