Seconds. Good evening. Thank you for joining us. Some unexpected twists for republicans in the already unconventional primary season. For democrats the rising tide for the outsider candidate. Will this wave of support be enough for Bernie Sanders to win South Carolina tomorrow . Our david wright spent oneonone time today probing for secrets from sanders. Reporter orange berg bark. Home of the panthers and the lady panthers. For one night only, senator Bernie Sanders. You have the right to vote, end of discussion. Reporter were with him backstage. How do you keep your energy level up . Bus im young, im not old like you. Running all over the country. Were doing great. These kinds of events really energize me, tell you the truth. Reporter down to the wire in the 2016 race for the white house. The primary season quickly coming to a crescendo. Especially over on the republican side. Hes not a strong guy. Reporter perhaps the Biggest Development today, a major endorsement. The best person to beat Hillary Clinton in november on that stage last night is undoubtedly donald trump. And so i am thrilled to be here this morning to lend my support. Reporter new Jersey Governor Chris Christie endorsed donald trump. Hes rewriting the playbook of american politics because hes providing strong leadership thats not dependent upon the status quo. Reporter that after a bruising performance last night at the tenth gop debate. Donald, relax. Im relaxed. Youre the basket case. Go ahead. Donald dont get nervous. Marco go ahead. I promise you reporter ted cruz and marco rubio tag teamed donald trump. Lastditch effort to stop him. Gentlemen, gentlemen reporter today at their separate campaign events, the schoolyard brawl continued. With rubio calling trump a con artist. Its time to pull his mask we are dealing with here. Reporter trump calling rubio a choke artist. Once a choker, always a choker. And that was one of the epic meltdowns. He didnt know where he was. I thought he was going to die. Reporter today donald trump mocked that moment during rubios state of the Union Response to the president s state of the union. Its rubio reporter today trump splashed water around as though it were flop sweat from rubio. For his part, rubio suggested trump may have peed his pants during last nights debate. During two of the breaks he went backstage, he was having a meltdown. Then he asked for a fulllength mirror. I dont know, why the podium goes up to here. He wanted a fulllength mirror. Maybe to make sure his pants werent wet, i dont know. Reporter compared to that tearing people down is easy. Building them up is what we need to be doing together. Reporter the democratic side seems downright tame. Week we could know who the nominees are. I think probably not, actually. Lets assume you run the table and youre the democratic nominee. Trumps the republican nominee that would be a lot of fun. How do you take him on . A man whose ideas and posture and behavior so is divisive, which really becomes an embarrassment to the United States of america. I dont think thats going to be a tough race. Reporter both of them are drawing huge crowds, including many firsttime voters. Both rail against a political system that they say is bought and sold by special interests. We the people are going to have a government that represents all of us, not just a handful of billionaires. Reporter one rails against billionaires. The other insists his billions man. I know the best people and im totally selffunding my campaign. In an odd way you guys are flip sides of the same coin. No, i dont think so. Talking about a broken tapping into peoples frustration no, one of us is tapping into hatred. One of us is tapping into a very positive agenda. Imagining the day when youre on that stage with donald trump what do you say to him, whats your strategy for taking him down . Why would i tell you . Hes probably watching your show. Reporter this is sanders penultimate stop in the palmetto state and truth be told its a disappointing crowd. Abcs mary alice parks is campaign. This is probably one of the smallest Bernie Sanders events ive been to. Is it your sense hes written South Carolina off . Have in the rearview mirror. Reporter sanders is putting in his time, but mostly hes put his focus on the states voting on tuesday and beyond. In orangeberg the two democrats almost ran into each other. The orangeburg fish fry and oyster bake, Hillary Clintons inside right now. Bernies waiting, hes on next. Reporter all the reporters traveling with the clnlinton campaign. Ive been to all the early states with her, clinton country, people like her here. Reporter in South Carolina, the democratic electorate is more than 50 black. We need you. Yes, ill be there for you. Reporter bill and Hillary Clinton have been canvassing the state making 22 stops here this past week alone. Sanders has made a handful. Sanders has sought inroads in the black community. Wake up, South Carolina reporter including a new endorsement and radio ad from director spike lee. When bernie gets in the white house, he will do the right thing. Im Hillary Clinton and i approve this message. Reporter clinton has plenty of celebrity endorsements too, including two ads from one of the most celebrated voices in america. Actor Morgan Freeman she understands that our country cant reach its potential unless we all do. Reporter last week voters at this barbershop told us theyll thats just like politicians go to our churches when its election time but we dont see them no other time. Again, youre going to have the uneducated thats going to fall for it. Those of us who pay attention, thats not working. That actually salts us, makes us not want to be in your camp. Are you only saying that because you want our vote . Or are you really sincere . The real question is will we ever really know . Reporter clinton and sanders have almost the same number of pledge delegates. How are you . Reporter it looks like shes about to get a big boost here in South Carolina. Clinton also has a massive lead among socalled superdelegates. Party grandees who get a say at the convention regardless of the outcomes of the primaries. The political establishment supports Hillary Clinton, end of discussion. If we do well and we start winning a whole lot of states and if the polls continue to show that i am a stronger candidate, i think a lot of maybe im not crazy about Bernie Sanders, but what is most important to us is defeating the republican candidate. Donald trump reporter barring a big surprise tuesday night on the republican night, its looking more and more likely that the gop candidate will be a certain brash new york billionaire. The republican race seems like its beginning to wrap up. The democratic race, a lot of people are expecting it to as well. But Bernie Sanders says hes not going anywhere, hes in this thing to the finish. He insists he sees a pathway to the democratic nomination. What were trying to do is literally unprecedented. It will be one of the great political upsets in american history. Victory . I do. Are you in this all the way up to the convention . Absolutely, no, no. California obviously is 20 of the delegates from california, 20 . Youre not going anywhere . Were going to california were off to the west coast, absolutely. Reporter win or lose big the long haul. Im david wright for nightline in orangeburg, South Carolina. Next, brie larson is the new alister in the spotlight. Tonight, why her role in room was so personal. Later, he hosted the oscars before. But will chris rock confront the oscar so white controversy . To get 0 financing for 60 months on a ford suv. Thats right. Just announced. Ford explorer. Edge. Escape. And expedition. Are available with 0 financing for 60 months. Ford suvs. Designed to help you be unstoppable. No wonder ford is americas best selling brand. But hurry, 0 financing for 60 months on ford suvs is a limited time offer. See your ford dealer today. Red lobsters lobsterfest is back. So come try the largest variety of lobster dishes of the year, like lobster lovers dream its a party on every plate, and youre invited. So come in while it lasts. [woodworker] i live in the fine details. Thats why i run on quickbooks. I use the payments app to accept credit cards. And everything autosyncs. Those sales prove my sustainable designs are better for the environment and my bottom line. Thats how i own it. Lets get these dayquil liquid gels and go. But these liquid gels are new. Mucinex fastmax. Its the same difference. This one is max strength and fights mucus. Mucinex fastmax. The only branded cold and flu liquid gel that is maxstrength and fights mucus. Lets end this. Whatcha doin . Just prepping for my boss party in a couple weeks. What are those . Crest whitestrips. They whiten way better than paste. Crest 3d white whitestrips. Id say. Someones making quite an impression. Crest 3d white whitestrips. Brie larson has been a successful supporting player in tv and film for two decades but this year she found her sweet spot. Earning her an oscar nomination for best actress. Why her turn as ma gave closure to a very difficult chapter in her life. Heres abcs robin roberts. Reporter in the intensely powerful film room a young mother is held captive with her 5yearold son in a garden shed. Stretch. Reporter its the only world her son has ever known. The mother is played by a remarkable young actress named brie larson whose career has been forever changed with this performance. The world is so big. Its so big you wouldnt even believe it. And room is just one stinking part of it. Rooms not stinky i dont believe in your stinky world reporter as a young girl brie moved to los angeles with her newly single mother. And they shared a cramped studio apartment. Brie would draw upon her moms experience for her character in room. Protecting her child. What i forgot up until recently was waking up in the middle of the night with me and my sister and my mom all in the same bed. Hearing my mom like covering her mouth, sobbing, trying to not make a sound for us to hear. It wasnt until i was prepping room where i realized that moment was the crack. Thinking, my kids are asleep, i can release. Where else is she going to go . My mom was struggling being in a very small space with two children and being sure to not put any of it on us. You realize how hard she tried. And you see it from this perspective that you couldnt as a kid. We lived in a studio apartment, a room with a bed that came out of the wall. My mom couldnt afford even a we ate top ramen. I had no toys. And i had like two shirts and a pair of jeans. And that was it. But i had my mom all to myself. And i remember it being the coolest period of time. I was really, really shy. Painfullily shy. So the idea of me wanting to do something thats extremely extroverted just seemed bizarre and unnatural. Being an actor hasnt been easy. Youre given mostly no. Theres these sayings, just keep on going, its around the corner i was like, this is the longest block ever. Its like 20 years walking on one block, waiting for the corner to turn. Reporter while successful as a supporting player in both tv and film, brie was searchinging for that role that would show her true tatants. And then she read the screenplay for a small independent film called room. And something inside her good morning, wardrobe. Good morning, tv. Good morning, sink. Youre 5 now . Youre 5 and youre old enough to understand what the world is. You have to understand. You have to understand. We cant keep living like this. You need to help me. Reporter the character allowed her to create an homage to her own mother and to connect more deeply with her costar. This is a mothering role. I had to really create the sense of companionship with this boy. How could you not want to just give everything you have to that brilliant little kid . Hes the best. I felt so much responsibility. I knew from being an actor at the same age jake was and how badly i really wanted to be respected and i wanted to do a good job. And i saw that in jake right away. I knew that he was in it for real. Be respected and so i was always going to make sure that he felt like a creative force. You saved me. Are you better now . Yeah, im starting to be. Room was really making it all about him. Making it about his experience. And it allowed me to really feel mom in a deeper way. We were doing the escape sequence. I always saw it as whats on the page. Its a mom giving up her son. She thinks that hes going to be okay but shes going to die. I always assumed it was about that. When we started doing it and i would remember just holing on to jacob in that rug and i felt this just like gutwrenching feeling of not wanting it to go and i realized that was me letting go of a 7yearold. Thats me letting go of my inner child. And letting go of that girl and it back. Reporter bries breakthrough resulted in the most powerful performance of her career. And gave her closure with the little girl she used to be. Its such a powerful metaphor for me now. It trips me out that this movie is the thing thats giving me that experience. Ill say byebye to room. Saying goodbye to the 7yearold that was in the studio apartment. That was blissfully unaware and also so hopeful of what was going to happen. Saying goodbye to my old normal. Ma has to commit to living in a bigger, more complicated world, and thats what i have to do as well. Youre going to love it. What . Thank you, robin. Be sure to watch the 88th Academy Awards this sunday night at 8 30 right here on abc. Next, he addressed the lack 2005. But how will chris rock confront the controversy this year . Check this out, bro. Whats that, broheim . I switched to geico and got more. More savings on Car Insurance . Yeah brofessor, and more. Like renters insurance. More ways to save. Nice, brotato chip. Thats not all, brotein shake. Geico has motorcycle and rv insurance, too. Oh, thats a lot more. Oh yeah, im all about more, teddy brosevelt. Geico. Expect great savings and a whole lot more. Ill be right back. Be good. Text mom. Boys have been really good today. Send. Nice. Brad could use a new bike. Send. [google] message. You decide. Theyre your kids. Why are you guys texting grandma . It was him. It was him. Appconnect. From the newly redesigned volkswagen passat. Right now you can get 1000 president s day bonus on new 2015 or 2016 finally tonight, the buildup to the oscars has been exciting and highly controversial. Who will dress the best, who will snatch the golden statues for best actor and actress, how will chris rock address the heres abcs nick watt. Reporter ever since the lily white nominations were announced, chris rock has canceled all interviews. Late last night tweeting, see you sunday blackout. Jada pinkett smith, will smith, spike lee are boycotting. Not rock. Hes hosting with millions eyeballs upon him. What you can expect from chris rock this oscar sunday is that he is going to go there. Reporter we know he will address the oscars, so why controversy . Not one black acting nominee. On twitter he already joked, the oscars are just white b. E. T. Awards. Our host for this evening, chris rock reporter this was last time he hosted in 2005. Its a great night tonight, we have like four black nominees tonight. So great, its kind of like the def oscar jam tonight. Reporter with every hollywood mover and shaker in watching at home if you get off on the wrong foot, its a real hard hole to dig yourself out of. I think he might relish that challenge. Im only here because ellen didnt want to do the show. Know what i mean . Im only here because ellen said no. Reporter other clues from his last time hosting, he will probably get political. Bush did some things you could never get away with at your job. Reporter he will definitely get personal. Wield that sword. Tobyey maguire is just a boy in tights. Reporter from the tv promos i might curse. Reporter he wont, we hope. We like to keep it clean at abc. But he is a safe choice. Tuning in you want to see how far hes going to take things, what hes going to say. Black movies dont have real names. You get names like barbershop. Thats not a name, thats a location. Reporter rock is publicly proud of hosting a very fast show last time. Expect that. Thank you reporter im nick watt for nightline in hollywood. Thank you it was english actor and Academy Award winner peter yusanov who said, comedy is simply a funny way of being serious. We wish chris rock serious success sunday night. Thank you for watching. Tune into gma monday morning. As always were online 24 7 on our Nightline Facebook page and at abcnews. Com. Now on ok tv, donald trump under attack. Five times. The blonde billionaire trades jabs at cruz and rubio in the nastiest gop debate yet. Were got his first words after the texas showdown. Amy adams fantastic cover. Inside the actress dishes all about her secret wedding. Then lady gagas new kiss filled message in defense of ka shah. And Kelly Clarksons emotional performance on american idol. Why she broke down on stage. Plus its that gross ratty old man george clooney. Its time for mean tweets movie edition and nobody is off limits. Big stars, big movies, big tv shows. Your Entertainment News source welcome to ok tv. Im megan telles in beautiful las vegas. We have got all of your Entertainment News. Vicious attacks. Thats not a good attribute for a president. Yelling, name calling. This guys a choke artist and this guys a liar. Donald trump going defense, literally under attack from both sides. And the latest nastiest republican showdown yet. The government doesnt support gentlemen the candidates sparring in houston over taxes, immigration and who repeats themselves the most. Himself i saw you five seconds ago. Trump tweeting afterwards, all the online polls have me winning the debate. I really enjoyed the evening. Not easy but good. Marco rubio still lashing out