Voters in 12 states set to go to the polls on tuesday. Is it trump clinton showdown in november all but a done deal . Were live on the campaign trail. Gunned down on her first day. A tragic shooting in virginia. I just want to be clear, do we have officers involved in a shooting . We have three officers that have been shot. An officer shot and killed, her first day on the job, two other cops injured. What police are saying this morning about the suspect. World cup crash. Olympic skier lindsey vonn with a horrific fall in the middle of a race on saturday. Today, despite that fall, and a fracture, shes back in action. And ready for oscar. Glitz and glamour on full display tonight at the 88th academy awards. Will leo finally take home his first oscar . And how will host chris rock address the controversy surrounding the lack of diversity. Were counting down to it all, announcer from nbc news, this is today, live from studio 1a in Rockefeller Plaza. And welcome to today on this sunday morning. Im erica hill. Im jeff rossen alongside the ladies as we love dylan dreyer and sheinelle jones. Youre rooting for leo tonight . I hadnt thought about it. It is really impressive. The film is really sort of a cinematic feat as you learn about all of the everything that went into it. And for what he put into that role, it is really an impressive performance. Theyre up for best picture, best direct, or and best actor. We want to start with our other top story and thats the other battle. The battle for the white house. Hillary clintons huge win over Bernie Sanders in South Carolina saturday. Clinton winning 74 of the vote. Bernie sanders just 26 . This morning, mrs. Clinton says she is not taking anything for granted as sanders vows hes far plenty of activity on the republican side as well. We have full coverage on and analysis for you. We begin with Nbcs Kristen Welker covering the democrats in South Carolina. Hi, kristen, good morning. You. Secretary clinton and senator sanders will set their sights on super tuesday states today, but this race has fundamentally changed after clinton broke all expectations with her overwhelming defeat of sanders here saturday night. Today, secretary clinton is starting a new phase of her campaign. Thank you so much, South Carolina reporter after her lights out defeat of Bernie Sanders saturday night. Tomorrow this Campaign GoesNational Reporter clinton now on her strongest footing yet, after beating sanders by more than 50 points in the palmetto state. We are going to compete for every vote in every state. We are not taking anything and granted. Reporter sanders, who was on a plane to minnesota as the devastating results came in, vowed to fight on. Tuesday, over 800 delegates are at stake. And we intend to win many, many of them. Reporter perhaps the most worrying sign for sanders as they head into super tuesday, clinton captured nearly 90 of africanamericans here, and even larger percentage than barack obama won in 2008. Clinton seeming to pivot to the general election with this less than subtle swipe at donald trump. We dont need to make America Great again. America has never stopped being great. Reporter but there are still clouds that hang over clintons campaign, underscored on friday when a veteran pressed former president bill clinton about the benghazi attacks in 2012. Wait, wait, wait, wait, wait. Do you do you have the courage to listen to my answer . Dont throw him out. My answer, ill answer it. Reporter aids to president Clinton Point out in the video shows that he allowed that protester to go on for nearly two minutes before he cut him off. Meanwhile, secretary clinton heads to the super tuesday states of tennessee and arkansas today. Senator sanders heads to oklahoma and colorado. Jeff . Busy sunday. Kristen welker, thank you. With South Carolina behind us, all eyes are now on super tuesday. Thats when Hillary Clinton and donald trump could both take a major step toward becoming their partys nominees. Here is the breakdown by the numbers. A look at why this is such an important day. Residents of 12 states and American Samoa will vote on tuesday. Hong those among those states on tuesday, along more than 20 of all available delegates are at stake here. And, of course, it is about the delegates. Texas has most up for grabs on super tuesday. 222 delegates for the democrats. 155 for the republicans. To super tuesday, can anyone stop donald trump at this point . Marco rubio and ted cruz, theyre on the attack, while the Republican Party is reportedly scrambling to figure out what to do if the billionaire does become the republican nominee. Nbcs Hallie Jackson in Oklahoma City this morning. Good morning. Reporter hey, good morning, jeff. This morning donald trump is sending a warning to the republican establishment. Hes tweeting, quote, lightweight senator marco rubio to say anything to hit trump, accusing him of pushing for that. Hes also reminding them of the loyalty pledge they signed not to run as a third party. All of this as rubio picks up another establishment endorsement, this one from tennessee senator lamar alexander. The brawl between the republican rivals now appearing to broaden party wide. After a sudden endorsement, a quick goodbye get in the plane and go home. Its over there. You go home. Reporter Chris Christie flying between donald trump and marco rubio. Hes flying around on Hair Force One and tweeting. Thank god he has really large ears. The biggest ears ive ever seen. Because they were protecting him. The guy with the worst fake tan in america is attacking me for put ing on makeup. Reporter rubio matching his on stage hits with online ones. His campaign launching trump slams. Com with super tuesday just 48 hours away. Trump on top, looking to all but lock up the nomination. A lot of outsiders are coming in because they like what i say. The stakes states are giving the control of the party of lincoln and the United States over to a con artist. Ill stay in this race as long as it takes. Reporter maybe all the way to a contested convention. Rubio ready for it. Even as Establishment Republicans worry his tough new tone may be too late. The New York Times reporting a the attacks against him, escalating. Now, it doesnt hurt that he inherited 200 million from his daddy. Thats a very good way to get rich, pick the right daddy. Reporter ted cruz overnight releasing his tax returns and rubio has too, putting pressure on trump to do the same. This is a man who prides himself on not getting scared of anything, so what is it that hes scared about handing over his tax returns . Tax returns dont mean anything about work, just so you understand. You never give a tax return when youre being audited. Reporter the frontrunner on defense, but in polls, still dominating. And the republican candidates will, of course, be blanketing super tuesday states today and watch where they are to get a little bit of a sense of strategy. Ted cruz after oklahoma here where the wind has been sweeping down the plain, will head to texas, spending a lot of time it is his home state. He has to win. You have marco rubio in virginia favorable for him than some of those deep south states where well find donald trump. Hes rallying in alabama. Guys . Hallie jackson, thanks so much. Chuck todd is moderator of meet the press and joins us from washington. Good morning. Good morning, erica. There is so much to talk about in terms of super tuesday and numbers. One thing that we cant seem to ignore here is what this race has become. These really juvenile insults, like playground talk, have you ever seen anything this is the race for the highest office in the land. Has it been this bad . Race for the highest office in the land and having the lowest moments possible. It is completely devolved. You have to ask yourself there was a cringeworthy moment at the debate when the three of them, cruz, rubio and trump, three frontrunners, and so talking over each other and it lasted for about 30 seconds and i sat there, i couldnt picture any of them taking the oath of office on the steps of the capitol. None of them looked president ial. To see that, i watched all that stuff yesterday between trump and rubio. Making the only thing missing was a your mama joke. And, you know, you say this and want to laugh about it, but it was incredibly uncomfortable. It is a total insultathan. There is a lot of talk and reports that there is infighting win the Republican Party, theyre trying to figure out what to do if trump becomes the nominee. Marco rubio saying hell take this fight for the nomination to the convention floor. Senator Mitch Mcconnell saying, quote, el hell be dropped like a hot rock if hes the nominee. Party . Theyre paralyzed. Part of the problem is neither rubio nor cruz have done the insider leg work to make these republican insiders comfortable, rallying around either one of them. Obviously rubio seems to be the one that has more potential to get all of this establishment support behind him, but there seems to be a hesitance on that front as well. Hes not getting influx of cash. Endorsements. It is a total paralysis and i think that now you have a party that you have leaders that are now worried that the party is going to completely splinter because you do have a number of conservative intellectuals saying they will never support trump and, of course, if that happens, that ends up guaranteeing Hillary Clinton victory in the white house. So the party is in desperate straits now. As Hallie Jackson reported, trump is tweeting this morning again, taking to twitter, his favorite platform and just tweeted again, im only republican who will get large numbers of dems and independents crossover and states that no other republicans can get. Is there some truth to that though . There is truth to the yes, there is truth that he will make some states more competitive than a traditional republican nominee. He is going to overperform if hes the nominee in a pennsylvania, perhaps a massachusetts, a connecticut, and new jersey. I dont think he can carry any of those states, though. You know, instead of instead of a republican losing those states by 10, maybe trump loses but the problem is for every improvement he makes in the north with say working class white voters, he loses hispanics in a place like arizona, georgia, north carolina. And then thats where the electoral vote just becomes in the democrats favor. We could keep talking about this all morning. But we have to move on. The good news is you have more coming up, chuck. Well catch you in a little bit on meet the press. Chucks guests this morning include Bernie Sanders, john kasich and ted cruz. And a reminder, on super tuesday, the place for you to be is nbc. Join lester holt, chuck todd and Savannah Guthrie for live coverage and analysis of all of the races on this crucial day. All of it begins right here at 10 00, 9 00 central. Some tragic news to report overnight, three officers shot, one of them killed, while they were pursuing a suspect in virginia. Sheinelle has more on that. Good morning. Jeff, good morning. It was officer ashley guindons first day on the job after being sworn in on friday. This morning. Just after 5 30 p. M. , Prince William county police were called to respond to a domestic shooting in wood bridge, virginia, a suburb just outside of washington, d. C. Were really assessing the situation inside the residence, our officers were shot. One officer down two. I dont know where the suspect is. 13051. 13051, Lashmere Court for doe midwestic. We have three confirmed hits. I want to be clear, do we shooting . We have three officers that have been shot. Reporter neighbors in the typically quiet neighborhood were shocked. I look down the street, and i saw a whole bunch of officers around someone and the ground. We had a total of three officers that were shot and wounded in this incident. All three have been transported reporter one of those officers, ashley guindon, was later, a somber facebook update by the Prince William county police, announcing that guindon had died from her injuries. One of the officers involved in tonights incident has passed. Reporter just one day on the job. She was sworn in yesterday and her shift was this was her first day working. So it the whole thing is just tragic. Reporter the gunman was taken into custody unharmed at the home where the initial shooting took place. His identity has not yet been released. Ashley guindon had previously served in the u. S. Marine corps and has family members in law enforcement. Such a tragic loss. Jeff . Sheinelle, thank you. A Church Service will be held in heston, kansas, tonight as residents gather to pray for the victims of thursdays shooting rampage. One of those wounded in the gunfire is 21yearold Melissa Torres who spoke exexclusively with nbc news about the terror of that day. We heard about five shots outside, five big bangs. Just begun her shift at excel industries when she came face to face with a gunman. At first i kept thinking this isnt real, this isnt happening, this cant be happening, and i realized i was shot, i seen blood gushing from my hand and i just kept thinking, i have to run, i have two daughters. A bullet fractured melissas hand, a bullet fragment pierced her hip. She says she is grateful to be alive but her peace of mind has been shattered. Three stabbing victims are in stable condition this morning after a Southern California ku klux klan rally turned into a bloody brawl. Protesters had gathered when six kkk members drove up. Police say as soon as they stepped out of their car, demonstrators attacked. Fists started flying. And so did knives. One member of the separatist group even used a flagpole as a weapon. In all, five people were injured, four transported to the hospital. There were also 12 arrests. Dylan is here with a check of your sunday forecast. Good morning. Nice warm day all across the country. Temperatures will continue to soar, especially back through the plains. Want to point out l. A. Where we have got the oscars later on today and hollywood, temperatures look nice and mild. We should be in the mid70s on the red carpet. Mostly sunny, light winds about as good as you can get out that way. We have got this warm air pouring in from the south. It is going to feel more like spring. Denver should make it up to 63 today. 70 in wichita. 17 degrees above average. Down along the gulf coast, temperatures running in the 70s. Up and down east coast, 60s. Through raleigh, atlanta, 59 degrees today in new york city. So temperatures will remain above average. We do have this front, this will cause a couple of lighter showers and snow showers. Especially through the northern great lakes where it is cooler. Otherwise, it is not. Good sunday morning. Im meteorologist mark capitolips. Well be soaked in sunshine here. A few high clouds streaming by. As we head through the afternoon, temperatures climbing into the low 70s. Some mid70s over the inland spots. All of us getting there through the course of the week. Not much rain in the forecast. And thats your latest forecast. Dylan, thanks so much. As you know, a huge night in hollywood tonight as the stars turn out for the 88th academy awards. Tonight could see some firsts as well as some controversy. Nbcs joel gar julio has more. Good morning, jeff. How are you, guys. The stage is set, red carpet rolled out and were hours away from hollywoods biggest night. The glitz and glam was overshadowed by controversy this year, sure to play into chris rocks hands. Tell me the difference between stupid and illegal. The movies. The moments. The neverending marathon of alisters parading down red carpet. Award season comes to a crescendo tonight as the oscars are finally here. Lets do this. Reporter all eyes now on host chris rock as everyone is waiting to see how he handles the controversy clouding this years show. 20 actor nominees, all white, the second year in a row. The usually outspoken comedian has been silent on the matter. Right now im concentrating on the movies. The subjects that are big in reporter despite the drama off screen, two actors emerged as odds on favorites. For the women, it is brie larson room. Im scared. I know. Reporter for the men, it is the revenants Leonardo Dicaprio. After a near awards season dicaprios side. The 41yearold has been up for best actor four times before, but hes never won. Critics say this is his year, performance in the revenant. Is there any way we do not hear night . Hes got it sewn up, locked, write his name on the envelope now, it is happening. Reporter his director Alejandro Inarritu is favored to win in his category. If that happens, it will be the first time a director takes home backtoback oscars in 65 years. Playing rocky for a seventh time, Sylvester Stallone is duking it out in one of the closest races of the night. Show me something. I think stallone will win an oscar. Isnt that great . 39 years ago, rocky won best picture but he lost best actor for playing rocky balboa. 39 years later, hes back. Reporter as for the best supporting actress category, everyone is pretty much has a shot. Were more likely to hear Alicia Vikander or kate winslet. Youre going to fix it now. Reporter it is a three way up to the academy awards, the Producers Guild picks the big short. I love my job. You hate your job. I love my job. Reporter the screen actors guilt went with spotlight. Get the system. It is time, robbie. Reporter and the revenant reigned supreme with the directors guild. Ever shifting favorites, setting the stage for an unforgettable night. So wh