together. the frenemies now doubling down on marco rubio. >> rubio stole from the republican party. >> the schoolyard taunts. and tonight, the new comeback line. >> we can't nominate a con artist to become the head of the party. the factory worker coming face-to-face with the gunman, a man he thought was his friend. what that shooter told him right before he opened fire. the new concerns about e-cigarettes tonight. they are exploding in pockets, setting cars on fire, and causing serious injury. one woman talking about her frightening ordeal. and, risky business. chris rock getting ready to rock the oscars, hosting in the middle of a controversy. promising a "blackout" is on the way. good evening. thank you for joining us on this saturday. i'm cecilia vega. we begin tonight with that showdown in south carolina. democrats at this hour still voting there. hillary clinton going big in the

sanders has struggled to introduce himself there. preliminary exit polls coming in, take a look. 6 in 10 voters are african-american, that could be a record. this primary testing the candidates' popularity with that group. also 7 in 10 voters want the next president to continue barack obama's policies. voters there with just a few minutes left to weigh in, and abc's david wright starts us off from columbia. david, good evening. good evening, cecilia. with those polls about to close, hillary clinton is planning a big victory party right here in this room. but she and bernie sanders are already looking ahead to super tuesday. today, hillary clinton was in fairfield, alabama, looking past bernie sanders and straight at the republican front-runner. >> i'm n going to ask taxpayers to provide free education to donald trump's youngest child. [ cheers and applause ] >> reporter: sande was in austin, texas, south carolina

>> i think we have a surprise coming for some people on tuesday. [ applause ] >> reporter: the clintons, bill and hillary, have invested heavily in the palmetto state, 23 stops here in this past week alone. today, bill clinton faced a heckler. at a rally in bluffton. >> and the thing is that we have four lives in benghazi that were killed and your wife tried to cover it up. >> reporter: things got even messier from there. >> why are you afraid to listen to my answer? why are you afraid? >> no, i'm not afraid, because i know you're going to lie. don't touch me. >> reporter: sanders has invested less time here. at his event last night, there were plenty of empty seats. are you in this all of the way -- >> california -- obviously, i think something like, 20% of the total delegates come from california. 20%.

anywhere? regardless of what happens here. >> we're going to california! we're off to the west coast, absolutely. >> reporter: today many of the voters said they got history with the clintons. >> she knows something. >> reporter: even sanders' supporters like richard scott say they know it's the way the wind seems to be blowing. >> hillary will be the one that wins south carolina. but i have to just put my support behind the person i believe in. >> reporter: you're voting your heart? >> voting my heart. >> voting with his heart. david wright joins us now from inside clinton's event in columbia, south carolina. david, clinton's camp is feeling confident tonight. they're certainly hoping for that big win. what are you hearing inside there? >> well, they know that they're going to win the only question is by how much? some of the polls had them up by more than 20 points. the clinton campaign actually said they stopped doing their own polls, because they didn't have to here. cecilia. >> david, thank you

all eyes on super tuesday. now just three days away, chris christie campaigning with donald trump one day after that bombshell endorsement. teaming up to pummel marco rubio, but the florida senator is doubling down, branding trump a con artist. but, is it too late to stop the billionaire businessman? here's abc's mary bruce. >> reporter: with his high-profile weapon by his side, new jersey governor chris christie, donald trunleashed a verbal assault on marco rubio. >> i watched this lightweight rubio -- total lightweight, and little mouth on him -- bing, bing, bing. bing, bing, bing, bing. >> reporter: rubio, trying to hurling personal insults. >> donald trump likes to sue people. he should sue whoever did that to his face. line of attack -- >> con artist. con artist. con artist. friends don't let friends vote for con artists. >> reporter: in georgia, at his largest campaign rally yet, rubio called trump a con man more than a dozen times.

>> trump's a con man. trump's a con man. the last thing i am, folks, is a con man. i built a great business, okay? >> reporter: also under fire, trump university. the mogul's now-defungtd school facing a $40 million lawsuit. tonight, a new attack ad using that as ammo. >> i paid $35,000 to trump university and all i got was a picture of myself with a cardboard cutout of donald trump. >> reporter: rival ted cruz is piling on, hammering trump for not releasing his tax returns. >> but maybe his tax returns show that he doesn't have quite as much money as he says he does. >> reporter: and trump is also taking aim at the media, threatening to weaken first amendment protections for reporters so he can sue them. >> the media -- the most dishonest human beings on earth, i'm telling you. >> reporter: but his supporters in tennessee aren't bothered by the attacks. all these new attacks we're hearing from rubio and cruz going after donald trump?

>> okay, mary bruce joins us now from tennessee. donald trump about to take the stage there. mary, so many endorsements. so much hope for a spot in the white house. is chris christie offering any indication that he's after a new job here. >> chris christie is set to join donald trump here. he has been asked a direct question. he'll go into the private sector to make money, just like donald trump. cecilia. >> mary bruce on the campaign trail. abc's jonathan karl joins us now. let's talk donald trump, if he comes out ahead, is it a done deal? that's the question everyone is asking. >> no, but it will be close. look, donald trump can kill off ted cruz on super tuesday. by winning in the southern but marco rubio can live to fight another day if he has a series of strong of second-place and third-place finishes. he continues to get delegates. his big day will be march 15th.

florida and ohio. if he can win those two states he can still come out on top. but he loses -- right now, he's behind in both polls. >> let's talk democrats, voting still under way in south carolina. hillary clinton hoping for a really big win. bernie sanders said he's going all of the way to california. when does this race come to an end? >> if she has a big win in south carolina, she's on a clear path to the nomination. it quickly becomes mathematically impossible for bernie sanders to catch up. >> all right, jon karl, thank you. stay with abc news for full coverage on super tuesday. with special editions on "good morning america" and "world news tonight" and george and the entire political powerhouse team on the air beginning at 10:00 p.m. eastern. on tuesday night. we want to move on to top stories. that deadly workplace shooting in kansas. the gunman's own video posted on facebook showing him firing an automatic weapon at a shooting range. he's accused of turning a gun on his co-workers. here's abc's eva pilgrim with the latest. >> reporter: tonight, a new

deadly workplace rampage. 28-year-old sarah hopkins, a former live-in girlfriend of the alleged gunman cedric ford, charged with giving a firearm to a convicted felon. hopkins telling investigators she gave ford her own ak-47 and glock pistol. after their breakup she had taken them back, but later "returned both guns because ford had threatened her." just a month later, ford posting this video to his facebook page, firing an ak-47. [ gunshots ] >> reporter: ford killed 3 of his coworkers and injured 14 more before being killed by police chief doug schroeder. adam miller was trying to evacuate his co-workers when he came face to face with ford. >> and so, i told him he needs to run, there's a fire and he just looked confused. i told him again. he said, i know, then he shot me. >> reporter: miller, who is still recovering in the hospital, was shot four times.

>> i don't know what he was going through. obviously he felt this was the way out. and so, my heart just aches for him. >> reporter: just 90 minutes before the shooting, ford was served at work with a restraining order to stay away from another ex-girlfriend, who claimed he was "in desperate need of medical and psychological help." cecilia, excel industries remains closed tonight. no word on when the plant will reopen. cecilia. >> okay, eva, thank you. we want to turn overseas to syria, defying all expectations, a cease-fire there now holding on for 24 hours. here's alex marquardt. reporting in tonight from a strangely quiet damascus. >> reporter: children playing tonight in an empty lot on the edge of damascus. none are from here, all forced from their homes in a war that has lasted as long as they can remember. today, this boy told me, they didn't bomb. across syria, the sounds of war all but disappeared.

quiet that hasn't been heard in years. few believe it can last, but many are praying it does. you're tired of the war? >> my mind and my heart and my baby all are tired of this war. >> reporter: scattered fighting did continue today. members of the aid group known as the white helmets said they rushed to rescue people in northern syria from the assad regime's infamous barrel bombs. but nearby here, in the south, they posted a picture today joking that the cease-fire meant they got a day off. today exceeded all expectations, and so, even if this fragile truce falls tomorrow, it still can be considered a success, a model to build on that could one day bring peace back to this country. cecilia. >> alex, thank you. and we turn back here at home. police in california say a drag race on a freeway near los angeles ended in this -- a deadly inferno lighting up the night sky for miles. three people were killed. one of the speeding cars apparently lost control, hitting

tractor-trailer through the divider into oncoming traffic. and now to a phenomenon, that we're seeing more and more, those popular e-cigarettes, some of them exploding suddenly and without warning. here's gloria riviera with one woman's frightening story. >> the car's gonna explode. the car's gonna explode. >> hang on, where are you? >> reporter: this frantic 911 call coming in just after an e-cigarette apparently explodes inside this car in naples, florida. >> it's huge. it's huge. the flames. >> yes, it was an e-cigarette. >> reporter: authorities say she told them she was smoking a modified e-cigarette when it exploded in her mouth, burning her face and damaging two teeth. >> i had char. i pushed the button and then it literally, like, i felt an impact in my face. i saw, like, sparks fly off in the passenger seat. >> reporter: the government saying millions of americans

so far, more than two dozen fires and explosions reported. at a kentucky gas station this week, his e-cigarette exploded in his pocket, he said, causing second-degree burns. another explosion nearly set a bedroom on fire. experts say problems often begin when the device's lithium battery is overcharged. >> 80% of all fires involving e-cigarettes have happened during the charging phase. >> reporter: currently the fda doesn't regulate the health and safety of all e-cigarettes. there's legislation under review at the white house. cecilia. >> gloria, thank you. an alleged impostor accused of fooling an entire pennsylvania high school. now, questions now about his relationship with a teenage girl. abc's kendis gibson has more. >> reporter: this young man fooled everyone for years.

school student. he's behind bars. facing new charges. police say artur samarin, now 23 years old, had sexual relations with a 15-year-old girl in 2014. now charged with statutory sexual assault. samarin has not yet responded to those charges, but earlier admitted from his harrisburg, pennsylvania, jail cell he did scam the system to stay in the u.s. >> i'm here in this prison because i've done a crime. i'm a criminal, unfortunately, but it is true. >> reporter: samarin also saying in 2012 he left ukraine, assumed the alias asher potts, and went to john harris high school every day for the last four years -- >> reporter: cops say when samarin's visa ran out, he forged documents, including a social security card, to enroll in school. samarin says he was simply trying to escape war-torn ukraine. >> i love the united stes. it's a land of opportunity for all of us immigrants. >> reporter: tonight, this alleged imposter is behind bars kendis gibson, abc news, new york.

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now banks are fighting back. this week, bank of america rolling out its first cardless atms. citibank giving me an exclusive look at how it's tightening security using biometrics. >> the iris scan. it is the second-most reliable marker in your body behind the dna. >> reporter: it may seem silly, but when people are thinking of iris scans, they're going to be thinking of grabbing an eyeball and putting it in front of a machine, that cannot happen? >> that cannot happen. no pictures, no videos, no eyeballs. >> reporter: a glimpse into the future. but until then, how to protect your money? >> this piece right here fits right over the card reader that you would find on a normal device. if you pull on it at all and it wiggles they should definitely not touch it. >> reporter: authorities say keep an eye out for tiny holes near the keypad, which could hide cameras capturing your pin number. gio benitez, abc news, miami. and when we come back -- from this. to this. the olympic wipeout by a star on

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all eyes on hollywood. final preparations under way right now for the big show, but with the boycotts and the backlash the big question this year -- will the controversy outshine the glamour? abc's nick watt has our sneak preview. >> reporl leo win? how great will george look? most importantly, what will chris say? spike lee, jada pinkett smith, will smith -- all boot because of the total lack of african-american acting nominees. but chris rock will be there, hosting. >> his brand of comedy is to absolutely go there. >> reporter: even before the nominations, rock wrote in "the hollywood reporter," "it's a white industry." >> and this year, that's what

they have to hear, so, he is sort of perfectly suited for this job this year. >> our host for this evening, chris rock! >> reporter: last time rock hosted in 2005, he went there. >> it's a great night tonight. we have four black nominees tonight. so great. it's kind of like the def oscar jam tonight. >> reporter: since this year's all-white nominations were announced, he's cancelled all interviews, said nothing. >> chris has been out there, he's been testing his monologue material on audiences at comedy clubs. i think he's been testing just how far he can go with it. >> reporter: how far? well, the show's producers told our own lara spencer, maybe even rock doesn't know yet. >> he's a perfectionist. >> he'll tweak up until sunday night. >> reporter: tweeting this week, "see you sunday. #blackout." nick watt, abc news, los angeles. we'll be watching. the big oscar show airs tomorrow night right here on abc. of course, stay with us as the voting results come in from south carolina. thanks for spending your saturday night with us.

have a great night. this is an abc news special report. the south carolina pry mire. now reporting george stepnopoulos. and we're come tong air with breaking news in the race for the white house. democrats voting in south carolina today. and abc news can project that

primary in that key state. she's riding a wave of overwhelming support in the african-american community, about 6 in 10 south carolina voters scoring a decisive victory in the state. cecilia vega has been covering that camp from the start. a sign of things to come in those seven southern states. >> exactly right. they weren't just hoping for a big win in south carolina they were hoping to crush bernie sanders and that's exactly what looks what happened. with the support of black voters from that state and that's exactly who she will be targeting heading into those southern super tuesday states. >> bernie sanders is going to stay in. jon the way the democrats have written their rules, once you get a delegate lead, very hard for the challenger to catch . >> absolutely. a big win here in south carolina. likely means a big win in those