Transcript for Donald Trump Under Fire in Democratic Debate
We're live from the first primary state this week, here inside the debate hall at Anselm college, where the democrats went at it last night. It's the last debate of the year. Also the feistiest. They clashed on taxes, gun control. Top issue right now, how to take on Isis and protect our home land. Donald Trump, the only gop candidate mentioned last night. Mr. Trump joins us live this morning. Bernie sanders and Chris Christie will be here, too. But we begin with the big moments from last night with Jon Karl. Reporter: Good morning, George. Going into this debate the democratic race was engulfed with allegations that the sanders' campaign stole voter data from Hillary Clinton's campaign. Bernie sanders offered a quick apology. Before they turned their attention to neutral enemy -- Donald Trump. Last night's debate started with a surprise -- a mea culpa from Bernie sanders. Not only do I apologize to secretary Clinton I want to apologize to my supporters. This is not the type of campaign I run. I very much appreciate that comment, Bernie, we should move on because I don't think the American people are all that interested in this. Reporter: Throughout the night, Clinton and sanders sparred on foreign policy. If the United States does not lead, there is not another leader. There is a vacuum. The United States is not the policemen of the world, the United States must not be involved in perpetual warfare in the middle east. Reporter: And on the economy and Wall Street. Should corporate America love Hillary Clinton? Everybody should. And will corporate America love a president sanders? No, I don't think they won't. CEO of large multinationals, may like Hillary, they're not going to like me. And Wall Street is going to like me even less. Reporter: Martin O'Malley called out both sanders and Clinton on gun control. Senator sanders voted against research dollars against this public health issue. We need common sense gun safety -- Let's calm down a little bit, martin. Do not tell me I haven't shown courage in standing up to the gun people. Reporter: And all three trained their fire on one man -- gop front-runner Donald Trump. We must never surrender our American values to racists, to the fascist pleas of billionaires with big mouths. Someone like Donald Trump comes along, I know the answer -- that all of the Mexicans, they're criminals and rapists. We hate all the muslims because all of the muslims are terrorists. He's becoming Isis' best recruiter, they're going to people showing videos of Donald Trump insulting Islam and muslims in order to recruit more radical jihadists. Reporter: As you heard an explosive allegation from Hillary Clinton against Donald Trump saying that Isis is showing videos of trump to recruit potential new jihadists. We asked the Clinton campaign where they got that from, they have not offered any direct evidence that has happened. Donald Trump tweeted overnight, simply, Hillary Clinton lied.
This transcript has been automatically generated and may not be 100% accurate.