Gma. Decision d millions of americans head to the polls this super tuesday. The biggest day for the democratic nomination by far. 15 crucial contests, joe biden picks up three big endorsements overnight from his former rivals. Folks, this is a team. Bernie sanders looks to build on his lead. The political establishment is getting nervous. And Michael Bloomberg appears on the ballot for the first time. Our Powerhouse Political Team spread out across the country covering it all. On air stunner. Longtime cable news anchor Chris Matthews abruptly announces his retirement on his show overnight after complaints from a guest about inappropriate comments. And royal reunion. The queen and prince harry meet for hours trying to patch relations after his royal exit. What the queen said about harry returning to royal life. We certainly do say good morning, america. Very busy morning. Super tuesday. Biggest voting day of the year by far right now. Well take a look at the voting getting under way in so many of the states, 14 states, also American Samoa heading to the polls this morning. More than a third of the delegates for the National Democratic convention up for grabs. Certainly a big day in politics and also big headlines on the coronavirus but first we want to get to that devastating tornado outbreak that happened overnight. I know youre getting photos from people down south. There are deadly twisters that tore across three states leaving a path of destruction in nashville and surrounding areas. Rob is here starting us off with the latest. Good morning, rob. Good morning, robin. What a horrible night across much of the midsouth and really a terrifying night in tennessee. This is a tornado, you can see the silhouette of it coming through the northern fringes of downtown nashville. One of seven tornadoes recorded across three states and worst of all these happened in the middle of the night when most people were asleep. Oh, my god. Reporter overnight tornadoes hitting the midsouth. Leaving least nine dead in tennessee. Severe damage in downtown nashville. Frightening video capturing the storm moving in. Emergency crews responding to several collapsed structures throughout the town. This was obviously a very strong tornado. There are multiple homes damaged. Multiple people injured. Multiple people still trapped. Theres gas lines that are leaking. Power lines are on the ground. Reporter on i40, damaged signs litter the road. Do you smell gas . Yeah. Oh, wow. Reporter this tractor trailer and another truck completely flipped on their sides. Sirens blaring, the tornado leaving a trail of rubble and debris. The roof of this gas station ripped off lying in the street. Exposed vehicles battered by the storm. Windshields ripped into shards of glass and windows of multiple homes blown out. This neighborhood in east tennessee left looking like a war zone. Thrstorms have been lingering across nashville so Emergency Personnel have had a rough time with the weather. The most Severe Weather to the south. A new tornado watch has been posted for central parts of alabama, including montgomery until 11 00 this morning and later on tonight another pulse comes out of the southwest. Dangerous storms potentially tornadoes san antonio to austin. These two will happen likely overnight. Amy . All right, rob. Thank you. We know youll keep us updated. The latest on the coronavirus emergency as the number of cases passes 90,000 worldwide and death toll climbs past 3,000. The Trump Administration announcing new travel screening procedures for people flying into the u. S. From those affected areas. Here in america, there are now at least 105 cases across 13 states. Four more people have died, bringing the total to six, all of them in Washington State. Kaylee hartung is there and starting us off with the very latest. Good morning, kaylee. Reporter good morning, amy. Over the past couple of days at all hours of the day and night weave seen people taken from this nursing home, rolled out on stretches and put into ambulances by Emergency PersonnelWearing Masks and gowns. The centers for Disease Control says we are facing a National Health emergency. And here in Washington State, this virus is attacking the most vulnerable among us. This morning growing fears about the coronavirus as the death toll in Washington State rises four of the victims from this nursing facility outside of seattle at the center of the outbreak. The risk for all of us of becoming infected will be increasing. Reporter staff and residents now being tested. For a second night in a row here at life care weve seen emergency vehicles speed in and now another person taken to the hospital. Reporter families with loved ones here, seriously concerned, colleen mallorys mother suffers from dementia. Im concerned about all of it, you know. If she gets sick shes going to be gone. Reporter in san antonio, local officials clashing with the cdc declaring a Public Health emergency hoping to stop the release of more than 100 people under quarantine at lackland air base including tyler and Rachel Torres who have been quarantined since their honeymoon on the diamond princess ship. We dont know whats going to happen to us. Its been a little bit of a roller coaster. Reporter their future uncertain after a womand cov1w quarantiurday while a cdc lewod as still penng harm. Aenprior potentpo tis reporter during the womans 12hour release Officials Say she went to a local mall, the food court and a hotel. Theres concern across the country as the coronavirus spreads in communities from coast to coast. New york city disinfecting schools, buses and subways after its first confirmed case was announced. A Health Care Worker who recently returned from iran now selfquarantining at her home with her husband. We said early on it wasnt a question of if but when. This is new york. Were a gateway to the world. Reporter fears of the spread of covid19 affecting Major American Companies too. Twitter telling all of its employees to work from home if theyre able. And facebook pulling out of the masse soh byouwe festival as a new petition calls to completely cancel the event which drew more than 400,000 visitors to austin last year. The cdc has sent a team to help investigate the outbreak. We still dont know how the virus infiltrated this nursing home. All of the residents here and associates of the nursing home are being monitored. About 100 people live here. Were told if anyone has a temperature, shortness of breath or a cough, theyre being put into isolation. George . Okay, kaylee, thanks very much. We want to get more on the travel screenings going in effect for people returning to the u. S. From countries with high number of coronavirus cases. Maggie rulli in london with those details. Good morning, maggie. Reporter george, good morning. Were seeing some Surprising New numbers out of china this morning. They have reported their lowest number of covid19 cases in more than a month, at 125. Now the second largest outbreak is in south korea with cases now topping 5,000. Just today the countrys president declared a war on covid19. Italy has also seen a jump in cases and all of this has led the u. S. To put some severe travel restrictions in place. As of just a few hours ago, all passengers coming into america on direct flights from italy or south korea will undergo multiple screenings before they can leave those countries. The checks will be organized by foreign airports, but the white house has also said that people would be screened again when they arrive back in the u. S. , but as of now, there are not any details about how those screenings would actually work. Now, guys, whats also still unclear is what happens to people who are flying indirectly to america from these countries, but have a layover in a different city. Now, with all of this unknown, Many Airlines are starting to offer travel waivers. Delta is now offering these waivers for any international destination. George . Okay, maggie, thanks very much. Were joined by dr. Anthony fauci, the director of the National Institute of infectious diseases, the top expert on that subject. Thanks for joining us. Weve reported on these latest numbers in the u. S. And were starting to see this Community Spread as you have been warning. I know theres so much we dont know but help everyone set expectations. How many more states and how many more people are likely to be affected in the United States . You know, george, you really cant give any kind of reasonable guess except to say very likely will be more and the reason we say that is the very fact and concept that you have Community Spread means that the source of these infections are not entirely known. People are cropping up in the community with infections and you cant really trace where they got it so the best you can do and this is what the cdc is doing together with the state and local Health Authorities is to then take that person who you know is infected and do the Contact Tracing to try and get the individuals with whom they came in contact with. But a prediction of the numbers is very, very difficult to do that accurately, george. And i know youre ramping up the testing as well. But is it time to start it and maybe you have surveillance testing even trying to capture people who arent showing symptoms so we can get a better sense of how far its spread in the community . Thats a very good point, george, and thats exactly whats starting to be done right now. Now that we have many, many more tests that are available, unlike a little while ago, whats going to be happening is that people are going to get the kind of screening where they may come in with a respiratory illness, and if they dont have the flu, test them and see, and if you do that, you may get a feel for if there are people under the radar who are there in the community who do have coronavirus. Thats going to be markedly racheted up by the cdc. Another big question how this will be treated. Whether a vaccine will be available. President trump spoke out on that yesterday. Lets take a look. We had a great meeting today with a lot of the Great Companies and theyre going to have vaccines, i think, relatively soon. And theyre going to have something that makes you better and thats going to actually take place, we think, even sooner. So its a lot of good things are happening. What exactly is the president talking about there . When do we expect to have a vaccine, and what is this treatment he seems to be talking about . Two things, george. First, a vaccine with regard to initial testing for safety, well likely do that within the next month and a half, six weeks or so. But once you determine test safety thats going to take at least three or four months. If you then establish it in order to prove that it works, its going to take another six to iegt eight months . So were at least a year away . At least a year away. The idea what the president was saying about the treatment is true because there are treatments now that are being tested in randomized controlled trials in china as well as here in the United States, for example, at the university of nebraska. We could know within a period of a few months, maybe in early summer, late spring whether those therapies work. If they do, unlike a vaccine, you could make them immediately available. Dr. Fauci, thanks for joining us this morning. Good to be with you. Robin . And george, now we turn to super tuesday, the most crucial day so far in the race for the white house. Voters going to the polls in 15 contests. A third of the delegates up for grabs and four major candidates still in the race. Overnight, those candidates out campaigning until the last minute. Joe biden surging after that big South Carolina win hoping to overtake Bernie Sanders as a frontrunner. Eva pilgrim is in dallas where last night joe biden picked up four major endorsements from three of his former rivals. Good morning, eva. Reporter good morning, robin. A show of unity and force. Pete buttigieg, Amy Klobuchar and beto orourke, not just endorsing joe biden, but traveling here to stand next to him. Overnight from competitors to a coalition. Folks, this is a team. Reporter in a matter of just hours, two of joe bidens biggest rivals for the nomination, senator Amy Klobuchar and Pete Buttigieg, becoming two of his most powerfuleisu biden, lastminute critical boost. Buttigieg walking side by side with biden at a Campaign Stop after ending his own run. Im looking for a president who will draw out what is best in each of us and im encouraging everybody who is part of my campaign to join me because we have found that leader in Vice President , soontobe president , joe biden. Reporter on an electric stage klobuchar officially closing her campaign at bidens rally calling on voters to come together in support of the former Vice President. If you are tired of the extremes, you have a home with me. And i think you know you have a home with joe biden. Reporter former candidate beto orourke also backing biden. We need somebody who will fight for democracy here and abroad because democracy is under attack here and abroad. We need joe biden. Reporter and no question there has been a massive momentum shift. Now biden telling me he doesnt need to win today, but he does need to stay within striking dance. His campaign saying their goal is to win delegates in every single super tuesday state. Amy . All right, eva pilgrim. Thanks so much, and going into this super tuesday, yes, joe biden, showing momentum, but Bernie Sanders remains the frontrunner, and Martha Raddatz has more from sanders hometown of burlington, vermont, one of the states voting today. Good morning, martha. Reporter good morning, amy. They are already voting lining up at 7 00 a. M. This is Bernie Sanders home state here in vermont and he will be voting here in this polling place today. He goes into super tuesday with very strong numbers. He has money. He has organization. And strong support especially with young voters. He feels very strongly that he will take california which is, of course, the biggest prize and he is cautiously optimistic about texas as well. Despite bidens huge win in South Carolina, Bernie Sanders is not changing his strategy at all. He criticized joe biden heavily last night at a rally in minnesota calling him part of the political establishment. But he had very kind words for klobuchar and buttigieg trying to welcome his voters to the sanders campaign. Good luck there, right, george . Thats right. Martha, thanks very much. Cecilia vega will be down in miami where Michael Bloomberg will meet with voters. Cecelia, he spent 500 million already. Will he do well enough to stay in the race today . Reporter yeah, well, george, that depends on what happens today. You know its a strategy that has never been tested before. Bloomberg skipped those early contests to focus on todays super tuesday and the numbers you said it just astounding so far. He has already spent more than 500 million of his own money on this race, on ads in super tuesday contests alone he has spent more than twice of what all his democratic rivals have spent combined, but it remains to be seen if this is a winning strategy. He has struggled with women. He has struggled with voters of color, and of course, he had that disastrous first debate. He says hes the guy who can take on donald trump. They have not shied away from going headtohead on twitter but, george, bloomberg is facing serious questions about whether he should drop out because he could be siphoning moderates away from joe biden. Lets see what kind of delegates he picks up tonight. Cecelia, thanks. Lets bring in jon karl for more on this. Elizabeth warren is still in the race a shes facing a fair amount of pressure from progressive allies of Bernie Sanders to get out. Absolutely. The argument from the progressives to Elizabeth Warren is, look, the centrists are coalescing around joe biden. Its time for progressives to coalesce around Bernie Sanders. But, look, the play for Elizabeth Warren here is to win delegates and hope for a contested convention and bring those delegates in and be a force in milwaukee. But, george, heres the key thing, two of her home states are voting today, oklahoma where she grew up, massachusetts that she represents in the senate. She has to at least win one of those states to show that she can win somewhere. Youd have to imagine. As we head into tonight as well, the magic number for delegates is 1,991. Thats the number of delegates the candidate will need to win on the first ballot. Well have a real understanding tonight of whether someone can get there or we arre headed to contested convention. No question about it, and Bernie Sanders is the one that can pull away tonight. Bernie sanders won in the west, won in the midwest, won in new england. Bernie sanders led in the polls in many of these states going in. Thquestion is does biden hav the momentum to stop him . Heres what to watch for. At th