Republican presidential front-runner Donald TrumpDonald John TrumpWSJ: Trump ignored advice to confront Putin over indictments Trump hotel charging Sean Spicer ,000 as book party venue Bernie Sanders: Trump 'so tough' on child separations but not on Putin MORE holds a 7-point lead over rival Ted CruzRafael (Ted) Edward CruzWashington needs to end hidden inflation tax on our capital gains GOP tax writer introduces bill to reduce capital gains taxes Senators push to clear backlog in testing rape kits 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 Antonio RubioHillicon Valley: Trump's Russia moves demoralize his team | Congress drops effort to block ZTE deal | Rosenstein warns of foreign influence threat | AT&T's latest 5G plans On The Money: Trump 'ready' for tariffs on all 0B in Chinese goods | Trump digs in on Fed criticism | Lawmakers drop plans to challenge Trump ZTE deal Overnight Defense: White House 'not considering' Ukraine referendum | Pompeo hopeful on plans for Putin visit | Measure to block ZTE deal dropped from defense bill 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.