Ben Carson has overtaken Donald TrumpDonald TrumpDNC 'applauds' Obama investigation into Russian hacking WATCH LIVE: Trump returns to Michigan for 'thank you' tour Trump stumps for Louisiana Senate candidate ahead of runoff MORE in Iowa, surging to a 14-point lead, according to a new poll.

A Monmouth University survey released on Monday found Carson taking 32 percent support in Iowa, followed by Trump at 18 percent.

That’s a 9-point gain for Carson from the same poll in late August, while Trump has fallen five points in that time.

The poll found Carson with the best favorability rating in the field, with an astounding 84 percent of Iowa Republicans having a positive view of him, compared to only 7 percent who view him negatively.

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Trump’s favorability rating is at 53 percent positive and 38 percent negative. His favorability rating is essentially unchanged from late August, although the percentage of those who view him unfavorably has increased by 5 points in that time.

Trump has led in nearly every poll of Iowa since early August, but the Monmouth survey is the third recent poll to show Carson with a healthy lead over the field in the Hawkeye State.

A Des Moines Register-Bloomberg poll released last week showed Carson with a 9 point lead, and a Quinnipiac University survey found Carson ahead by 8.

Carson is ahead among all demographic groups in Iowa, according to Monmouth. He leads among Republicans who describe themselves as "somewhat" and "very conservative," as well as self-described moderates.

Carson also leads among evangelicals, non-evangelicals, men and women in the poll.

“Trump’s support has eroded in a number of key areas, with the beneficiary being another outside candidate,” said Monmouth pollster Patrick Murray. “One question is how secure Carson’s new found support really is.”

Only 19 percent of likely Iowa Republican caucus-goers said they have made up their minds on whom to support, giving hope to lower polling candidates.

Rounding out the field are Sens. Ted Cruz (R-Texas) and Marco Rubio (R-Fla.), at 10 percent each, and Jeb Bush at 8 percent.

Businesswoman Carly Fiorina take 5 percent support in the poll. Sen. Rand Paul (R-Ky.) is at 3 percent, while Mike Huckabee, Bobby Jindal and John Kasich each take 2 percent support.

Outsider candidates such as Trump and Carson, though, appear to have the advantage based on the deep anti-establishment sentiment among likely caucus-goers. Fifty-seven percent said the Republican Party has done a bad job representing their views.

“While the leader board positions have changed, the outsider candidates still dominate this race,” said Murray. “The GOP’s leadership may hope that an establishment figure will emerge, but that may not happen while their voters remain dissatisfied with the party as a whole.”

Bush, Kasich, Paul and Christie are the only candidates with negative favorability ratings in Iowa, according to the poll.

The Monmouth University survey of 400 likely Republican caucus-goers was conducted Oct. 22-25 and has a 4.9 percent margin of error.