Transcript for Donald Trump Takes on Hillary Clinton, Miss Universe Error
"Your voice, your vote," and that new national poll shows some big moves, Ted Cruz on the rise pulling close to Donald Trump, the two of them pulling away from the rest of the field as Donald Trump has colorful language for Hillary Clinton. Jon Karl issen 0 the trail. Good morning, Jon. Reporter: Ted Cruz is rising fast, but Donald Trump remains on top and he is now aiming his harshest attacks at Hillary Clinton. Overnight at a packed rally in Grand Rapids, Michigan, Donald Trump went on an odd diatribe against Hillary Clinton. Using a sexually derogatory term to describe how she got beat by Barack Obama in 2008. She was favored to win and she got . She lost. I mean she lost. Reporter: And he went after her for what she said in the ABC democratic debate. What happened to her? No, she's terrible. She's terrible. Donald Trump is on video and Isis is using him on the video to recruit and it turned out to be a lie. Reporter: That you would sponsor -- Reporter: That's a reference to this moment from the debate. They are going to people showing videos of Donald Trump insulting Islam and muslims in order to recruit more radical jihadists. Reporter: Clinton's campaign is providing no direct evidence that that has happened. Trump has demanded an apology. Hillary Clinton says hell no she won't apologize. You've demanded an apology. What now? Look, she lies and has been a liar whether e-mails or -- Reporter: Said hell no. She doesn't want to apologize. That's okay. That's up to her but she lied and she should apologize. Reporter: The argument she's paying beyond the video is that your words are being broadcast throughout the Arab world and, you know, why -- I mean, is there any doubt that Isis would use what you're saying about muslims. But there is no argument beyond the video. She said Donald Trump is on a video and they're distributing the -- you know, et cetera, et cetera, okay, and there really is no argument beyond the video. They are using lots of things, I imagine to recruit but they didn't use me on a video and I'm not sure they used me at all frankly. Reporter: He angrily dismissed suggestions he is the republican Hillary Clinton could beat most eastly. When they say they want to run against me that means they don't want to run against me. Reporter: I saw you tweet about it. I did. Reporter: You talk to democrats. They say they would love nothing more to run against you. Because that's a smart thing for them to say. I have to apologize. Reporter: And for the first time on camera trump, the former owner of the miss universe pageant who sold the organization after a controversy about his comments on immigrants weighed in on the screw-up Sunday night when miss Colombia was briefly crowned the winner by mistake. What was your reaction when you saw that happen and you saw them crown the wrong winner. It was just a mistake. He read the card wrong. Simple. He just read it wrong. Crazy the way life works. It will probably end up being a good thing -- all over the world that's what they want to ask about. Reporter: Trump told me he believes Hillary Clinton will be a tough opponent for republicans, but, George, he is absolutely insistent that he is the republican best poised to beat her. Let's go back to that new poll out. Trump holding up at the top. Cruz moving up a lot and big moves for some of the other contenders beneath. Reporter: Yeah, moves down for Ben Carson and for Marco Rubio. They both lost significant ground over the last month. The other movement is at the back of the pack can Chris Christie moving up slightly, still at the back but moving ahead within the margin of error of Jeb bush. Yeah, he's moving up in new Hampshire, as well. Jon Karl, thanks very much.
This transcript has been automatically generated and may not be 100% accurate.