Transcript for Hillary Clinton: 'I'm Absolutely Confident That I Will Be the Nominee'

Tom, thanks very much. My interview now with Hillary Clinton, she's under pressure from Bernie sanders before tomorrow's big vote in Wisconsin. Thank you for joining us. Glad to be here with you. Bernie sanders is on a winning streak, won five out of the last six. Wisconsin, he's ahead right now. Why can't you put him away? I'm happy where I'm at. Two important indicators the number of pledged delegates I'm significantly ahead. After all, that's what determines the outcome. The popular vote, I have close to 9 million votes that's a million more than Donald Trump and 2.5 million than senator sanders 37 I feel like we're on a good path. It's an exciting time in American politics, because I think people are really tuning in and trying to figure out what we're going to do and I think what I have said is we need to elect somebody based on three tests. Can you do things that are going to improve people's lives? Can you be the commander in chief and keep us safe at home and around the world? Can you unify us? We're desperately in need of given some of the rhetoric in this campaign. That has been your message so far. But he's on this winning streak. Don't you have to win your home state here in New York in two weeks sf. I'm going to do everything I can to win in as many places as possible. But I have been through this before. We were laughing before we started, I can remember how hard it was when my husband ran in 1992. I ran a tough campaign against then-senator Obama. So, we have a system and I'm very confident that I'll be the nominee. I'm not taking anything for granted. Even if you don't win new York? I'm confident that I'll get the nominee. I'm proud of the work that I did with so many thousands of new yorkers. So, of course, I'm going to work incredibly hard. You know, in Milwaukee on Saturday night, you talked, you're a loyal, true democrat, clearly a shot at Bernie sanders. When I asked him about that, the fact that he's an independent is a strength in the campaign. In a lot of the polls right now, he does better than you in the general election. Well there are a lot of polls that say just the opposite. But polls this far out don't mean anything. What's important is not what somebody's theory is but how many votes have you gotten. That's what we determine elections based on. I also believe it's important that we elect more democrats. I would love to see the senate go back to being democratic instead of having republicans who won't do their constitutional obligation. Well, there's no indication that there's any interest there. I'm committed to electing democrats. I'm helping to fund democratic campaigns. Attend of the day a president can do a lot and I have a very robust agenda with big goals for our country. I think I got a track record of proven results. I think it will be better for the country if we move away from the obstructionism, the extreme partisan ship that we're seeing today. Follow the constitution, which right now doesn't seem to be the case. You're hitting Donald Trump pretty hard. Your first ad here against Donald Trump. Are you worried at all this goes to a contested convention on the republican side and they pick somebody else, a fresh face, who might be a more difficult challenge. I had that experience, too. I started running out in the new York senate, Rudy Giuliani, he dropped out and then I had a fresher face to run against. I have no control over what the republicans do. Even though I'm working hard to win the nomination and compete with senator sanders everywhere, it's important not to let the kind of comments we're hearing not just from Donald Trump but the other republican contenders go unanswered because the world hearse those. Lot of people in our country hear insulting comments about immigrants being called rapists and criminals. Profiling Muslim communities. And they wonder what is happening in our country. While I'm focused on the primary and getting the number of delegates necessary to be the nominee I'm going to keep standing up to Donald Trump, Ted Cruz or anybody else who are saying things that are so contrary to who we are. That gets me to the last test, do you want to unify the country? You and Bernie sanders are going to debate in New York. I'm hoping to, we offered dates which they refused. You offered -- "Good morning America" offered a debate during "Good morning America" on Friday the 15th. I'll be there. I think it's great opportunity to reach an audience that may not be able to because of other obligations to tune in to debates. I understand there's a debate in the works for the night of the 14th. I'll be there. I want to debate and I'm confident that we can work out a time to do that. Thank you. Excited if we get the debate. Let's move on to March madness, the final matchup turning into a sibling showdown.

This transcript has been automatically generated and may not be 100% accurate.