Trump grabs double-digit lead in Iowa poll

Donald TrumpDonald John TrumpGingrich: Trump ‘mishandled’ Rosenstein memo on Comey Trump to gift Macron framed upholstery: report Former presidents, first ladies come together to honor Barbara Bush 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 CruzCruz's Dem challenger slams Time piece praising Trump Race for Republican Speaker rare chance to unify party for election 32 male senators back Senate women's calls to change harassment rules MORE, at 26 percent, and Marco RubioMarco Antonio RubioGOP Senate candidates trade barbs in brutal Indiana primary Students gather outside White House after walkout to protest gun violence Overnight Energy: Senate confirms Bridenstine as NASA chief | Watchdog probes Pruitt’s use of security detail | Emails shine light on EPA science policy changes 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 CarsonOvernight Tech: AT&T chief takes the stand to defend merger | Facebook keeps most users out of EU data law's reach | HUD reopens probe into Facebook housing ads | Venture capital firms go to bat for cryptocurrencies Overnight Finance: IMF chief warns against US-China trade war | Trump, Abe can't strike deal on tariff exemptions | Republicans push Trump to rescind Gateway funds Facebook investigated over alleged housing discrimination MORE at 6 percent, Jeb Bush at 3 percent, Mike Huckabee at 3 percent and Rand PaulRandal (Rand) Howard PaulGOP senator: Democratic opposition to Pompeo 'driven 100 percent by politics' Pompeo lacks votes for positive vote on panel CIA declassifies memo on nominee's handling of interrogation tapes 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.