Carson surges past Trump in Iowa
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GOP presidential candidate Ben CarsonBenjamin (Ben) Solomon CarsonTrump administration ending delay on over B in Puerto Rico disaster aid HUD to roll back Obama-era housing desegregation rule Trump tells California, New York to 'politely' ask him for help with homeless population MORE has plowed past Donald TrumpDonald John TrumpLev Parnas implicates Rick Perry, says Giuliani had him pressure Ukraine to announce Biden probe Saudi Arabia paid 0 million for cost of US troops in area Parnas claims ex-Trump attorney visited him in jail, asked him to sacrifice himself for president MORE in a second poll of Iowa voters released on Friday.

Carson wins 28 percent of likely Republican caucus-goers in Iowa, according to the Bloomberg Politics/Des Moines Register poll, while Trump gets 19 percent. 

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According to the poll, that represents a 10-point surge for Carson, a retired neurosurgeon, since late August, and a 4-point drop for Trump.

It's the second poll in as many days showing Carson knocking off the billionaire businessman from the top spot in the Hawkeye State, where the real estate tycoon has led for three months. 

Carson beat Trump 28 to 20 percent in a Quinnipiac University Poll released Thursday.

The results suggest social conservatives in Iowa, long a force in the state’s caucuses, may be gravitating toward Carson.

Sen. Ted CruzRafael (Ted) Edward CruzSeven things to know about the Trump trial All the frontrunners could survive initial Iowa test Republicans face internal brawl over impeachment witnesses MORE (Texas) is in third place in the Bloomberg poll with 10 percent. Sen. Marco RubioMarco Antonio RubioApple under pressure to unlock Pensacola shooter's phones Senators offer bill to create alternatives to Huawei in 5G tech Surging Sanders draws fresh scrutiny ahead of debate MORE (Fla.) follows with 9 percent, while former Florida Gov. Jeb Bush ties with Sen. Rand PaulRandal (Rand) Howard PaulPaul predicts no Republicans will vote to convict Trump Graham on impeachment trial: 'End this crap as quickly as possible' Ocasio-Cortez accuses Rand Paul of taking climate change comments out of context, compares GOP agenda to 'Spaceballs' plot MORE (Ky.) at 5 percent each. 

Carson is the most positively viewed Republican in the field among Iowa Republicans surveyed, with 84 percent viewing him favorably. Rubio follows at 70 percent, with former businesswoman Carly Fiorina close behind at 66 percent.

Carson is also the second-choice candidate among a plurality of Republican respondents, trouncing the GOP field as the combined first or second choice of 47 percent of Iowa caucus-goers. 
 
Trump follows as the combined first or second choice of 28 percent of those surveyed, with Rubio at 20 percent, Cruz at 19 percent and Fiorina at 17 percent. 

The latest poll showing a rise for Carson and drop-off for Trump comes ahead of the third GOP presidential debate next week in Colorado.

The Bloomberg poll of 401 likely GOP caucus-goers was conducted Oct. 16 to Oct. 19 with a margin of error of 4.9 points.