Republican presidential front-runner Donald TrumpDonald TrumpWhy global health investments are key ‘Making America Great’ Major golf tournament opens at Trump National Golf Club in Va. Pence to Navy grads: Trump 'will always have your back' MORE holds a 7-point lead over rival Ted CruzTed CruzFEC faults Cruz on Goldman Sachs loans in rare unanimous vote CBO score underlines GOP tensions on ObamaCare repeal Republicans go to battle over pre-existing conditions MORE in Iowa, fueled by first-time GOP caucusgoers, according to a new poll.

Trump leads Cruz, 31 to 24 percent, in the Quinnipiac poll released Monday morning.

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Marco RubioMarco RubioSenate panel could pass new Russia sanctions this summer McConnell on Trump: 'We could do with a little less drama' Taking the easy layup: Why brain cancer patients depend on it MORE has 17 percent, while no other GOP candidate has double-digit support, with Ben Carson the closest, at 8 percent. 

Trump has edged past Cruz in the Hawkeye State over the past few weeks but on Monday shied away from predicting a win over his GOP rivals.
 
Trump's rise in the Quinnipiac poll is boosted by first-time Iowa voters: 40 percent say they will support him, compared with 22 percent for Cruz. 
 
Among first-time voters, Sanders holds a major lead over Clinton, 62 to 35 percent, while Clinton holds a 9-point lead among those who have caucused before.

Martin O’Malley has 3 percent support in the Hawkeye State.

Attention in the 2016 cycle has been largely dominated by political outsiders, and pollsters predict high turnout could boost Trump and Sanders, who have positioned themselves as such.
 
The survey of 890 likely GOP caucusgoers and 919 likely Democratic caucusgoers was conducted Jan. 25–31 via landlines and cellphones with a margin of error of 3.3 points for Republicans and 3.2 points for Democrats.