Chances . Also, donald trump claims hes bringing in countlss new voters into the Republican Party. Theyre coming by the millions. Are they really new voters . We have the answer. And also, a brash billionaire turned reality tv star with an eye on politics. Sound familiar . My interview with Dallas Mavericks owner mark cuban. What would it take to convince you to run in a 2020 or 2024 . And joining me for insight and analysis are Alex Castellanos, Helene Cooper of the new york tis, joyann reid, host on msnbc, and Robert Draper of the New York Times magazine. Welcome to sunday. Its meet the press. Go sunday morning. We have a lot to get to today. New poll,the infighting, now on the democratic side. My interviews with Hllary Clinton and mark cuban. Lets start with the numbers. Our new nbc news walstreet journal poll, and what appears to be a dratic tightening of the general election contest. Hillary clinton led donald trump by just three points in the new poll, 46 43, but look where we were a month ago. Clinton had a double digit lead over trump. Bernie sanders, by the way, does a lot better when matched up against trump. He clobbers him 54 39. A 15point stred. I asked Hillary Clinton why in light of these numbers she thinks shes a stronger candidate than sanders against trump. Well get to that in the interview in a moment. But these resul also show that donald trump is gaining ground as republicans unite behind their candidate while democrats remain deeply divided. Hillary clinton is delivering a blunt message to Bernie Sanders supporters. I will be the nominee for my party, chris. That is already done in effect. Theres no way that i wont be. Barring defection by superdelegates, clinton needs just 85 more delegates to become the Presumptive Democratic nominee. But sanders is conceding nothing. Before we will have the opportunity to defeat donald trump, were going to have to defeat secretary clinton. His campaign adding in a statement, it is clear that millions of americans have growing doubts about the Clinton Campaign. Some democrats worry that sanders criticism will stick. She has given speeches on wall street for 225,000 a speech. And at the chaos on display in nevada state convention, where sanders supporters lashed out will break out in philadelphia at the National Convention nevadas party chair released threatening messages she says shereceived. I just wanted to let you know that people like you should be hung in public execution. The sanders slow walk may be doing damage. In a general election matchup, just 66 of sanders voters say they plan to support clinton. 17 support trump. Clinton is more than hinting that its time for him to get out. I will do everything i can to unify the party. I did that when i pulled out in 08. Some of you remember. In some ways, its deja vu all over again. In may of 2008, clinton had to apologize after she defended staying in the nomination process this way. We all remember Bobby Kennedy was assassinated in june in california. She may have a tough time winning over all of sanders supporters. Eight years ago, her voters liked president obama. Right now, sanders voters view her negatively. For now, trump is playing up the democratic divide. I think berney should run as an independent, okay. Let him run. We know what tmp has in mind there. Anyway, with all that in mind, sat down yesterday with Hillary Clinton right here in our studio and gan by asking her about the threat that Bernie Sanders poses to her candidacy. Is Bernie Sanders now helping donald trump . Oh, i dont think so. I think that senator sanders has every right to finish off his campaign however he chooses. I do think there will then be the obvious need for us to unify the party. I faced the same challenge in 2008. I will certainly do my part reaching out to senator sanders, reaching out to his supporters and i expect him to do his. And he said about a week ago he was going to spend seven days a week trying to defeat donald trump. And i belve thats the case. You know, earlier this week, you just said emptically, look, im going to be the nominee. Right. About ten days earlier, you werent ready to say that. The only thing that has changed is you narrowly won kentucky. Why did you think it was important to verbalize that . I think having gone through 2008, as i did, it was much closer between thensenator obama and myself in 2008. I actually won nin of the last 12 contests in 2008, including kentucky, West Virginia, indiana, other states. And i wanted to make it clear that i know what this feels like, having lived through it. I have 3 million more votes in the case of senator obama and myself, it was neck and neck in the popular vote. I have far more pledged delegates. Itas much closer between me and senator obama. And i am going to be the nominee, and i want to spend a lot of my time,s you have seen me do, really taking on trump, because i find what he says, the kind of candidacy hes presenting to pose a danger to our country. You know, its interesting, though. Hes making a case, Bernie Sanders, senator nders, to super degates, and theres another memo that they put out this weekend just showing how much stronr he is against dond trump than you are. Our own poll, hes got a 15point le over trump. You have a 3point lead over trump. You made an electability case seven days bere the final day of the primary season to super delegates back in 2008. Why shouldnt super delegates, you wanted them to listen to your argument eight years ago. Why shouldnt super delegates listen to the Bernie Sanders argument and say maybe he is more electable . Well, first of all, people have voted for me overwhelmingly in the democratic primary process. And that is absolutely clear, and very difrent from where we were in 2008. I could make the case, which i did, that i was actually slightly ahead in the popular vote when we ended that primary, but i was behind in the pledged delegates. Its also fair to say that i have been vetted and tested, and i think that that puts me in a very strong position. You dont think Bernie Sanders has been vetted. You dont think this Long Campaign has vetted him . I dont think hes ever had a single negative ad against him. Thats fine, but we know what were going into and understand what its going to take to win in the fall. Finally, i would say that polls this far out mean nothing. They certainly mean nothing to me, and i think if people go back and look, they really mean nothing in terms of analyzing whats going to happen in the fall. You think the lead for sanders is an illusion . Ill let others speak to that. I just think im in a much stronger position, have been, and the voters who have turned out and given me 3 million more votes believe that as well. It does seem he has specific demands he would like to seeet at the conntion. If hes not going to be the nominee, some include perhaps getting rid of super delegates. Creating a rule that says all primary contests should be open to independents, things like that. Are you okay with those, if thats what it takes to get him onboard, to say, okay, well do this in the platform, well change the rules. Well change the platform. What do you say . Certainly, were going to talk with him when hes ready to talk and listen to him. We will take into account what he is asking for. I think thats part of the process. Getting rid of super delegates, would you be inavor of that . Im not going to negotiate with him today on your show. Im going to say when its time im reaching out to do my part to try to unify the party. I expect him to do the same. I did that when i lost a much closer race to senator obama. Because i knew that whatever our differences were, just as whatever our differences are between me and senator sanders, ty pale in comparison to donald trump and the republicans. And i think most of senator sanders supportersunderstand that as well. Would you hes accepted an invitation to debate in california before the california primary. Have you thought about accepting that invitation . Well consider it, but im really youre not ruling it out yet . I havent thought about it. Well consider it. I think whats important is were not going to let, at least my campaign, is not going to let donald trump try to normalize himself in this period between you think a competitive democratic primary is doing nothing but helping donald trump right now . I didnt say that. I said if we dont respond to donald trump, which im doing, as you have seen, i have said he was unqualified to be president. I believe that deeply. Im going to keep focused on donald trump because i will be the nominee. I will be running against donald trump in the fall, and i do not want americans and, you know, good thinking republicans as well as democrats a independents, to start to believe that this is a normal candidacy. It isnt. What he is advocating, look what hes done this past week. You know, attacking our closest ally, england. Heaping praise on a dangerous dictator in north korea. Reiterating his call to pull out of nato, talking about letting other countries have nuclear weapons. Advocating a return to torture and even murdering the families suspected terrorists. That is beyond the pale. And it poses immediate danges. I go around the country, chuck, all the time. And iny events in the last few weeks, i have had republicans coming to tell me they are supporting me. They have different reasons. For a lot of women, its the divisive, demeaning comments that donald trump has made about women. For others, a businessman just told me yesterday in texas, he said im a republican, i always voted republican. Im here giving you money, supporting you, because i do business all over the world, and im watching what this trump efefct is doing to our standing in the world. You know its interesting. Theres a lot of democrats that are quietly nervous that your candidacy isnt responding to what the populous wants right now. They want major change. The populous wants makjor shakeups and your campaign has been youre going to build on the progrs barack obama has made. This electorate is saying we want major changes. We aske them, essentially testing your message versus testing his message, even if it comes with an unpredictability, by ten points, they want the unpdictability thats how fed up they are. How do you respond to that . First of all, i have 2 million more votes than donald trump. I think voters, as opposed to the kind of back and forth and the public arena, when voters show up to vote, they take that vote seriously. And yes, i know he has a pluraty of republicans who have voted for him. But i think in e course of this campaign, we are going to demonstrate he has no idea theres no evidence he has any ideas about makingmerica great, as he advertises. He seems to be particularly foced on making himselfppear great. And as we go through this campaign, wereoing to be demonstrating the hollowness of his rhetoric. And the danger of a lot of what he has said. And i am very confident that the American People are going to want chnge. Every election i about the future. I have laid out very positive approaches. Im not running for anybodys third term. Im running for my first term. I also want to do what works. My goal is to produce positive results for the American People. More good jobs, rises incomes. The kinds of tangible progress i think people are yearning for and they need and deserve to see. You know, Bernie Sanders has been talking about a political rolution. A future you can believe in. Viously, donald trump with the make America Great again is one of these slogans that have taken off for better or for worse. If you can sum up, what is the big idea of your campaign . Were stronger togethe were stronger together in facing our internal challenges and our external ones. Were stronger together if we work to improve the economy, and thats going toean trying to get the republicans to do what will actlly help produce more jobs, like we saw in the 1990s. Were stronger together when we have a bipartisan, even nonpartisan Foreign Policy that protects our country. And that provides the kind of steady, strong, smart leadership that the rest of the world expects from us. I know that slogans come and go, and all the rest of it, but when i look at where we are in our country together, we need to unify the country. Were stronger together when we act on a set of plans and priorities that will g down to the benefit of the American People. How do you do it . Yore a polarizing figure in american politics. You have an unfavorable rating almost as high as Donald Trumps. How do you do it . Its not as high. Its not, bt its pretty high. Pretty polarizing, hes polarizing. How do you do it if youre elected president . Jus the way i did it when i was first lady, senator, and secretary of state. When i have these jobs, chuck, i actually get things done and i work with people across the aisle. Honestly, i worked with republicns in the 90s to create the Childrens Health insurance program. I worked with tom delay, the hammer in the house, to reform adoption and foster care. I worked with practically every republican. And i worked as secretary of state to get things done and to reduce nuclear weapons, for example, between russia and myself. So i have a track record. And im going to remind people of that because its not just rhetoric for me. I was secretary of state, i d a very approval rating, as you can go back and check. Because i was doing a jobhat people could see. When i get into the arena and all of the gativity that been thrown at me for 25 years as is recycled and put out there, i know i have work to do, but im confidt its going to be successful. A cucouple more questions. U said, bill clinton, you were basically going to put him in charge of getting the economy ing again. What doesthat mean . What i said in kentucky and West Virginia is there are parts of our cntry that have bn eft out and left behind for too long. I am going to ask my husband, who has a great track record in creating jobs, putng people to work, revitalizing communities, to be in an advisory role, working with me, working wit our cabinet, to try to figure out what we can do. You know, every first lady has taken on special projects, and i think my husbands understanding of how to get this economy moving in places that have been left behd will be incredibly valuable. Both donald tmp and Bernie Sanders have been runng against some of the economic policies of the 90s, trade, wall street deregulation, things like that. Does that concern you . Theyre not running against 23 million new jobs, theyre not running against incomes going up for everyone. Not against medium Family Income going up 17 and for africanamericans, 33 , and ending up with a balance and a surplus. I said i wanted to renegotiate nafta. I voted against the only multinational trade deal when i was in the senate. I stated my opposition to the trance pacific partnership, based on what it was negotiated to include. Im more than happy to take on that airport. I ask people when they criticize the 90s, what do they criticize, the peace or prosperity . A lot of americans think of that as a time w wre they thought they were getting ahead, and we ran smack dab into the failed republican economic policy. I know youre not going to reveal how youre vtting a runing mate, but you saw this process up close with al gore. What did you learn from that process of your husband picking al gore and the governing structure he was involved in that youre going to use . The most important thing is to pick someone who you have absolute confidence in can be president. Thats more important tha any characteristic. And then someone you can work wit someone that you believe will be a good partner, not just to you but to the rest of the government. Someone who can go around the country as joe biden has done very well, in explaining and advocating for the policies of the obama administration. Mark cuban. Yes. I did an interview with him earlier. He expressed serious interest if you called him up and said, i want to vet you to be my running mate, he would listen. What do you say to tht . We should look widely and broadly. Its not just people in elected office. It is successfulbe business peo. I am very interest in that and i appreciate his openness to it. I think you plan on having people who maybe have never served in elected office . Im absolutely intending to look far and wide. I think that is the best way to find somebody who can really capture whats needed in the contry. And Business People have, especially successful Business People who are really successful, as opposed to pretend successful, i think have a lot to offer. Pretendsuccessful . Is there anything donald trump has done that you think should be aise i think he needs to release his tax returns. The only two we have show he hasnt paid a pey in taxes, yet he goes around talking about make ameri great. Yo know, that means paying for our military. That means paying for our roads. That means paying for the v. A. That means a lot of things. If you haveomeone running for president whos afraid to release his tax returns because it willxpose the fact he pays no federal income tax, i think thats a big problem. Theres nothing about his background that is praise worthy . Well find out. Because we have to get below the hype. We have to find what the reality is. You dont feel like you know that . I dont think the country knows it. Do you . I think that were beginning to find out, but i dont think we know enough. Thats why he should release his tax returns, prove he actually has a level of success he claims to have. Thanks for comingn. Coming up, my interview with entrepreneur and Dallas Mavericks owner mark cuban who says hs open to discussing being a running mate for either Hillary Clinton or donald trump. What about run