This is cnn tonight, im don lemon. We have a busy hour coming up, and here are tonights big headlines. Joe bidens historic comeback on super tuesday putting a new spin on the democratic race for the nomination. Elizabeth warn is still in the race, but for how much longer . Bidens base coming out in full force. Can he hold on to it as he tries to capture the nomination . Are americans doing enough to protect themselves from coronavirus as the outbreak grows . Im going to talk to a california congresswoman who is also a medical doctor. Bernie sanders using barack obama in a campaign ad, but obama hasnt endorsed anyone. Well see how effective the ad is. A man set to be executed tomorrow in alabama for the murders of three Police Officers, but he didnt pull the trigger. Tonight well examine the facts of the case. But first, super tuesday changing the race for the democratic nomination. We are the campaign to defeat donald trump. Every democrat out there, and most independents and some republicans understand the moral imperative to defeat donald trump. And i believe that the nature of our campaign, which is grassroots, is the campaign to defeat trump. And this is a movement we are building. It is a movement. And we need that movement to beat donald trump. And to build a future we all know is possible. You know, im especially proud of our campaign. It is generating so much enthusiasm, driving up voter turnout all across the nation. So joining me now, mark mckinnon, former advisor to george w. Bush and john mccain, also Washington Post columnist catherine. And Senior Editor at the atlantic ron brownstein. Mark is also the executive producer of showtimes, the circus. Ron, what are you going to run this weekend . Reruns, nothing to run, nothing going on . Mark, i should say mark. Sorry. I said mark, not ron. You gave me a show. I meant mark. What are we going to have to fill the air time . What a difference a day makes, huh . This is the most dramatic time in politics. Lets go back to clyburn. Ron, is there a more influential endorsement in your history . No. The only thing people talk about comparable is the kennedy endorsement of obama and obama was already a strong candidate. Theres no one who has taken a candidate as compromised a position as joe biden was and given a boost ron, we were talking about that with catherine during the break here about the timing, right, catherine . The timing was perfect. She was wondering if he had done it sooner would it have helped joe biden. But i think everything sort of played out perfectly, sort of the buildup and he did it. It was dramatic and authentic. And i think it really was perfect and it gave him the boost that he needed at the right time. Umhmm. If he had done it earlier and lost some states in the interim, clearly the impact would have been diminished, right, i think thats clear. This could not have been look, he needed it and it detonated, it really began a series of events that the town hall, the debate, the win, the magnitude of the weight of South Carolina consolidating so many africanamerican voters. And then that unbelievable 48 hour period with three former rivals. To me, you know, the contrast between all of these elements of the party coalescing around biden while Bernie Sanders chose after winning New Hampshire and nevada not to strike an inclusive tone, to say he was running against the democratic establishment as well as the republican establishment, to say he was only going to pick a vicepresident who was supportive of medicare for all reaffirming his comments about fidel castro, the contrast between those two things i think sent a pretty clear signal to the democratic voters who had been skeptical of sanders we talked about this a little last night, don. To me one of the striking things in the polling, if you look at people identified as democrats, partisan democrats, sanders lost them almost everywhere by 20 to 30 points last night. If youre running, it may be if youre running to be the nominee of a party kind of condemning that party as a tool as kind of a corrupt institution, as a tool of kind of corporate malfeasance, may not be the best strategy. Seriously, mark, walk us through the last couple days. I said a difference a day makes. We said the last 72 hours. But really, i mean, think about the momentum that happened and the people who decided at the last moment to go in to we say pull the thing, not many people pull it any more, they mark it. Think about that. One question a lot of us had was how much how many people early voted and might those late endorsements not have as much impact, but they clearly did. And so, i mean, you had pete buttiegieg, harry reid, clyburn endorsement gave tough love for the campaign which i thought was interesting, too. It was just a cascade. By the way, this is just a testament to me about how strategic voters are thinking in this democratic primary. Voters and candidates. Yeah. Theyre really thinking you had voters who were drifted to bloomberg because they thought oh, joe is kind of getting wobblier. May not be the guy. As soon as he had his first debate where he drove his ferrari out of the garage into a fire hydrant. And then they came back to biden, so theyre looking at it strategically. We had all this stuff when we talk about ukraine stuff. I dont want to do the bidding of trump because its all its kind of b. S. Because kind of . Its b. S. Because trump wants the media to do his bidding on ukraine, on hunter biden, because i really think democrats see through that and they know that it Means Nothing because i dont think anyone any democrat is going to go to the poll i was talking to people in d. C. Today as i made my way back here. Theyre like, look at trumps children. They dont care. They dont care about trump about biden and ukraine. They dont care. The point is after all thats been heaped on joe biden theyre not thinking about it as they go to the polls. It is just noise, noise. Its clear the republicans are thinking about that. Republicans arent going to vote for joe biden. What i mean is republicans who have some power to reignite some of these investigations, right . As soon as biden once again became the front runner they started trying to revive these conspiracy theories about him. Do you think its going to matter when democrats go to the polls, an investigation is going to matter . Tea i dont know that it will matter to democrats necessarily. But to the extent their gettable suburban voters, what have you, i think the real challenge for us in the media shouldnt we learn about the emails . You would think. Shouldnt we learn if from that . I think the real challenge for us in the media is how do you douse these conspiracy theories without, to extend the metaphor, i guess, without giving them more oxygen. Right. And how do you put voters mind to rest about things they should have nothing to worry about without repeatedly exposing them to the lie. I think this is the way trump has figured out how to hack the system essentially. There is a lot of social Science Research to back this up. Even when you fact check the lie, what people often remember is not the fact check and the fact the thing was wrong. They just remember the thing that was wrong. I think what you do is, you mention it and you dont delve into it too much and you move on. Well, what i have heard the metaphor i have heard used is you use a truth sandwich. You lead with the facts. You talk about whatever the lie was, you brush it aside and you return to the facts. And you talk about whatever the issues are that the candidates are actually running on and you try not to give as much air time to the nonsense conspiracy theories. Now lets move on to bloomberg and warren. Weve done our journalistic duty. They didnt waste any time jumping out of the race. When is he going to jump . He did it. He put his support and his money behind biden. How do you see this new alliance playing out . Well, i think it was pretty admirable, right . Not many people can spend half a billion, as much money as he spent and then kind of pull the plug as quickly as he did. He basically it seems like he meant what he said, his main goal was to beat donald trump. He had a theory of the case that biden would be wobbly and weak and the party would be looking for an alternative to sanders. It almost happened, except biden revived in South Carolina and then all of the consolidation around him. I think bloomberg is going to be a tremendous asset for the democratic nominee in the general election, kind of his own enormous super pac. We still have a primary to go through. Bernie sanders, i think joe biden clearly has the upper hand at this point, but its not quite over. If you go back to 2016, Bernie Sanders ran very well in several of the industrial midwest states. He won michigan and wisconsin. He was extremely competitive in missouri and illinois. In the first three contests, first four contests of this year, he did win most of the noncollege white voters. That got away from him last night. That was one of the most important things that happened. Biden beat him among noncollege whites. Now biden is going to have to defend that with sanders coming after him on trade, on his openness to entitlement cuts as part of a grand bargain in the past and other issues. You know, it may be that the die is cast, but biden still has to go through a crucible in the midwest in the next couple weeks. Plus he faces the fact if warren gets out a one on one debate. He is a more nimble debater. Mark would agree, catherine would agree. Thats on policy. Thats all substantive stuff that they should be debating about. Right. What has been interesting to me is that people have been wondering is bloomberg going to be the spoiler . Is he going to be the spoiler to biden when he got into did, yit thinking he somehow wanted to get make trump lose. Well, somehow hes going to make trump win because hes going to be the spoiler. Well, think about it. He may have been the thing that elevated biden because then people saw how he performed on the debate stage and they said, well, you know, maybe biden is the best bet. You know what im saying . You see what im saying . Yeah, its very ironic. In an odd way. The reverse happened. Hes the guy that helped people turn back to biden rather than away from him. Well, maybe. Its interesting. I feel like bernie bros were angry that bloomberg was in the race. Now theyre really angry that bloomberg is out of the race. I kind of cant keep track of the logic here. I think, if anything, this narrative that like the billionaires are propping up excuse me, propping up biden is misplaced, in part, because bloomberg is your key point of evidence here. He spent 500 million and was if anything siphoning votes away from biden, his poor debate performances notwithstanding. To the extent that billionaires thus far have played much of a role in the race, i think it was intended maybe to hurt biden, although obviously bloomberg has changed his tune since then. I want you to take a look at this is a response from Mike Bloombergs twitter account to one of trumps tweet attacks. They tweeted the scene from star wars. Im not sure if you guys saw this. Watch this. Your powers are weak, old man. If you strike me, don, i shall become more powerful than you can possibly imagine. I mean, this is where we are now in 2020. Do you think hes going to stay engaged like this and get under trumps skin . This is for you, catherine. Oh. Yeah, if bloomberg has proved himself good at anything its pushing trumps buttons. Whether that served to benefit bloomberg is a separate issue, but he has been very effective at getting trump to, to commit some unforced errors and say stupid stuff on twitter. Not that thats so terribly difficult, but hes clearly very good at getting under his skin. I have to go, im not joking. This is going to be a behemoth of a show, isnt it me . We have the whole show already. Thats dangerous. When are we going to cut . Youre like me forgetting days. Thank you, guys. Thank you, don. Coronavirus is spreading in this country and the president is talking about it tonight. Why he says that he was afraid that he would look bad for letting americans exposed to the virus come home. My brows . In perfect shape. With new micro ink brow pen. From loreal. Microbladelike precision without commitment. Our unique combtip shapes and fills with hairlike strokes. For natural brows made easy new micro ink brow pen. From loreal paris. Were worth it. E trade core portfolios is an easy, automated way to get invested. Well save you time by building, monitoring and managing a portfolio for you and provide all handson deck support when you need it helping you become top dog. 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Earlier reported 159 cases, but that has been revised. President trump saying tonight that he was concerned about the optics of repatriating americans abroad who were exposed to the coronavirus. I felt we had to do it. And in one way i hated to do it statistically, i hated to do it from the standpoint of having people coming in thats going to is it going to look bad . I wasnt worried about the other people catching it very much because our people are so good and we had quarantine set up. Joining me is congressman ron ruiz from california, he serves as the chair of the Congressional Task force and serves as a public expert with an m. D. From Harvard University as well as masters in Public Policy and Public Health. We appreciate you joining us. Thank you so much, congressman. Thank you, don, its good to be here. Listen, californias gavin newsom announced a state of emergency. He grand princess is being held off the coast of california because 11 passengers, ten crew members are symptomatic. You used to be an emergency room doctor. What do you think of these precautions . Well, i think those are good precautions, first of all. And second of all, what the president said about caring more about how he looks than the health and how the American People feel is just abominable. Its not the leadership that we need right now in this serious outbreak that were having. Working in the Emergency Department during the h1n1 flu season, its no joke. We have physicians out there right now. Theyre doing their best working extra hours in overcrowded Emergency Departments throughout the entire country. And having a president who minimizes this is hurtful, not helpful. What we need to do is to have a Straight Talk with the American People to say that although this virus can produce mild symptoms, there are individuals who are older than 60 who have underlying illnesses like diabetes, heart disease, lung disease, weak immune systems that can get seriously ill and that can die. So everybody should have the personal responsibility and social responsibility to make sure you wash your hands with soap and water for 20 seconds, to make sure you use hand sanitizeers with 60 alcohol at least, to make sure that you dont touch your face, and that you clean your counter tops and stay away from people who are coughing and sneezing. And if you do if you are sick, make sure that you stay home, that you stay away from people who i mentioned are at higher risk. That you wear a mask, and that if youre going to cough and sneeze, obstruct it completely with a tissue. Throw it away. And immediately wash your hands. And dont forget to wash your hands and use hand sanitizer. Can you something really quickly for me . Ive been having people ask me to be more specific when we say people with preexisting conditions are at more of a risk. Yes. What do you mean by preexisting conditions . Well, anybody who takes medicine for an illness is somebody with an underlying disease. Its people with chronic illnesses. Ill name you a few so the American People can really understand. If you have diabetes. If you have severe asthma or emphysema, copd, or if youve had a heart attack with congestive Heart Failure and have difficulty breathing when you walk. If you use oxygen. If you are taking medications for cancer that can weaken your immune system or if you have hiv aids, your immune system is lower. This could be any age group. If you combine that with the older populations, then the older that you are over 60, then the more at risk you are of getting really sick. So, don, this is what i would tell you. I would tell you to wipe your counters and your desk with clorox or lysol. Your phone especially. I would tell you if you have an elderly parent or a Family Member who is sick, then take extra precautions to stay away from them if you feel like youre getting sick, and to make sure that every time youre around them, dont touch their face, wash your hands often so that you can protect them. I got you. I want to get this question in because were running out of time, congressman. Absolutely. You were in todays Coronavirus Briefing with the vicepresident. Does this administration have control on this Public Health crisis . You know, were seeing a lot of change from before, but we are at a point where the threshold is very its imminent and people are going to get sick. I saw dr. Sanjay gupta who i know, i saw in haiti when i was there taking care of the haitians after the earthquake. And he showed those graphs where there is a certain threshold where this is going to spike. And that threshold is dependent not only the characteristics of the virus, but the characteristics of our capacity as a society to contain and to mitigate the damage t