Trump grabs double-digit lead in Iowa poll

Donald TrumpDonald John TrumpBiden slams Trump over golf gif hitting Clinton Trump Jr. declines further Secret Service protection: report Report: Mueller warned Manafort to expect an indictment MORE has captured a double-digit lead in the first voting state of Iowa a little over a week before the caucuses there, according to a CNN/ORC poll released Thursday.

Trump is supported by 37 percent of likely GOP voters in the Hawkeye State, followed by Ted CruzRafael (Ted) Edward CruzSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea GOP state lawmakers meet to plan possible constitutional convention MORE, at 26 percent, and Marco RubioMarco Antonio RubioOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Trump bets base will stick with him on immigration MORE at 14 percent. 

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That represents at least a 3-point rise for each of those candidates from the same survey conducted in late November and early December. 

All other candidates remain in single digits in the latest survey, with Ben CarsonBenjamin (Ben) Solomon CarsonThe Federal Reserve is setting America up for economic disaster Baltimore's failing schools are a tragedy of criminal proportions The US can grow its own farm workers MORE at 6 percent, Jeb Bush at 3 percent, Mike Huckabee at 3 percent and Rand PaulRandal (Rand) Howard PaulSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Lawmakers grapple with warrantless wiretapping program MORE at 2 percent.

Trump has been battling Cruz for the past two weeks for support in Iowa.

This week Trump unveiled an endorsement from former 2008 Republican vice presidential candidate Sarah Palin, who campaigned with him in Des Moines. Iowa Gov. Terry Branstad also called for the Texas senator to be defeated. 

While Cruz was considered a month ago to be a favorite to win the Feb. 1 caucuses in Iowa, several recent polls have indicated a much tighter race between him and Trump there. 

The pair have battled for the support of evangelical voters.

The CNN/ORC poll of 266 likely GOP caucus-goers was conducted Jan. 15–20 via telephones with a margin of error of 6 percentage points.

Three recent polls in the state have shown more malleability in the race between the two front-runners, with one finding Cruz with a 2-point edge and two others putting Trump up by either 1 point or 6 points.

Nearly half of respondents in the latest CNN/ORC poll, 49 percent, said they have "definitely decided" on a candidate, while 22 percent are leaning toward one and 28 percent are undecided.