Cruz Gains Ground as Trump Attacks

The GOP frontrunner began to attack the Texas senator after recordings of Cruz criticizing Trump were revealed.
1:51 | 12/13/15

Coming up in the next {{countdown}} {{countdownlbl}}

Coming up next:



Skip to this video now

Now Playing:


Related Extras
Related Videos
Video Transcript
Transcript for Cruz Gains Ground as Trump Attacks
Cecilia? Fearless indeed. Kayna, thank you. We turn to politics now. Donald Trump somewhere he's not used to being. Second place. There is also a big republican debate just days away, the gloves are already coming off. ABC's Mary Bruce reporting in from the white house. Reporter: Tonight, the bromance between Donald Trump and Ted Cruz is on the rocks. It's not a contest between the two of us, just so we understand. Reporter: As Cruz gains ground, trump for the first time is taking aim at the Texas senator, targeting his faith. I do like Ted Cruz, but not a lot of evangelicals come out of Cuba. Reporter: In Iowa, trump jabbed Cruz for opposing popular ethanol subsidies. If Ted cruise is against ethanol, how does he win in Iowa? Because that's very anti-iowa. Reporter: This Iowa farmer tells us it's trump or bust. Anybody else gets in, it's the same old garbage. Nothing gets done. Reporter: You think he's the only one? I think he's the one that can get it done, yeah. Reporter: But trump also has kind words for his chief rival, saying Cruz would have a role to play in a his administration. We would certainly have things in mind for Ted, to be honest with you. Reporter: In South Carolina today, trump came under fire for his call to ban muslims entering the U.S. But he stands by his controversial proposal. We don't want people coming in and knocking down world trade centers and having what happened last week. Reporter: Now, trump is already responding, blasting that new poll that shows Cruz with a ten-point lead. Trump tweeting tonight, "Don't trust the Des Moines register poll." He says it is biased towards trump. Cecilia? Mary Bruce at the white house tonight. Thank you. And there will be a big democratic debate, too, right here on ABC. Join David Muir and Martha Raddatz for the New Hampshire democratic debate, your voice, your vote. One week from tonight, Saturday, December 19th, 8:00/7:00 central.

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

{"duration":"1:51","description":"The GOP frontrunner began to attack the Texas senator after recordings of Cruz criticizing Trump were revealed.","mediaType":"default","section":"ABCNews/WNT","id":"35737171","title":"Cruz Gains Ground as Trump Attacks","url":"/WNT/video/cruz-gains-ground-trump-attacks-35737171"}