Carson claimed 28 percent support among 574 likely Iowa Republican caucus-goers polled Oct. 14-20. | Getty Trump: I was 'very surprised' to see Carson leading in Iowa

Donald Trump says he is "not sure he agrees with" Thursday's Quinnipiac poll of likely Republican voters in Iowa in which he finished behind Ben Carson. But he also thinks his campaign is doing better than the poll indicates.

"Well, I was very surprised to see it," Trump told radio host Hugh Hewitt in an interview.


Carson, a retired neurosurgeon, claimed 28 percent support among 574 likely Iowa Republican caucus-goers polled Oct. 14-20.

Trump, who was in Burlington, Iowa, last night, remarked that he had 4,000 people at an event.

"It was packed. It was great. It was a lovefest. It was amazing. And I was actually surprised, I’m not saying that a thing like that can’t happen, but I was very, very surprised to see it, because I think we’re doing well in Iowa," he said. "I have a feeling we’re doing much better in Iowa than the polls are showing, if you want to know the truth. But we had an amazing crowd, I’m sure you saw it, because it was all over television."

The Manhattan billionaire had led Carson by single digits in Iowa, and reiterated once more that he was "very surprised to see" that he was not leading in the latest poll.

"That’s the only one I’ve had that I’m not leading," he said, before referencing an Emerson College poll of 271 likely Republican primary voters in Massachusetts in which he received 48 percent.