Ben Carson Is on a Roll, Donald Trump Falling in Polls

New poll shows Trump losing by double digits to Ben Carson
2:20 | 10/26/15

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Transcript for Ben Carson Is on a Roll, Donald Trump Falling in Polls
In the meantime, we turn to the race for 2016 and new signs of potential trouble for Donald Trump. New Numbers tonight. The third poll in a row now showing trump losing to Dr. Ben Carson in Iowa by double digits, 14 points. But trump is now saying about those polls, as this evening, he's taking heat for what he calls, quote, a small loan from his father when he was young. $1 million loan. ABC's Tom llamas on the campaign trail. Reporter: Tonight, Donald Trump telling supporters don't believe the hype or the polls. I'm number two in Iowa. I said, I don't believe it. One's Bloomberg, they hate me, the other one is a super liberal newspaper, "The Des Moines register," which is third rate, totally third rate, not respected in Iowa. So, I got these two polls. Bloomberg hates me, don't forget, Michael did want to run for president. Reporter: Today, trump getting new scrutiny, saying he's had to fight his whole life, even though his father was a multimillionaire who gave him a start in real estate. It's not been easy for me. It has not been easy for me, and, you know, I started off in Brooklyn. My father gave me a small loan of $1 million. Reporter: Nothing small about a million bucks, but trump says it isn't very much compared to what he's built. Now, with Ben Carson well ahead in Iowa, trump hitting the retired neurosurgeon hard. After saying you can't criticize someone's faith, trump then said this about Carson's. I'm presbyterian, that's down the middle of the road, folks. In all fairness. I mean seventh day adventist, I don't know about, I just don't know about. Reporter: Carson demanding an apology. A couple of months ago, I said something which he took as an attack on his faith, and I apologized for that. I hope he will have the same grace. Reporter: But trump refuses. And today, new comments on religion getting attention, saying women in Muslim countries appreciate their customs and some want to keep their faces covered. In fact, it's easy. You don't have to put on makeup. Look how beautiful everyone looks. Wouldn't it be easy? I'll tell you, if I was a woman -- I'm ready, darling. Let's go. Reporter: And David, despite those poll Numbers, trump is not giving up on Iowa. He's hitting the hawkeye tomorrow night, his last stop before the debate on Wednesday. David? Tom llamas, thank you. And now to the other

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

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