Fox News Poll: Trump gains ground in Iowa

Republican presidential front-runner Donald TrumpDonald John TrumpDems win from coast to coast Falwell after Gillespie loss: 'DC should annex' Northern Virginia Dems see gains in Virginia's House of Delegates MORE is back atop the GOP field in a new Fox News Poll with 34 percent support.

The latest results show an 11-point gain for the real estate mogul among Republican caucus-goers in the past two weeks.

Sen. Ted CruzRafael (Ted) Edward CruzOvernight Finance: GOP criticism of tax bill grows, but few no votes | Highlights from day two of markup | House votes to overturn joint-employer rule | Senate panel approves North Korean banking sanctions GOP criticism of tax bill grows, but few ready to vote against it Anti-gay marriage county clerk Kim Davis to seek reelection in Kentucky MORE is in second place in the poll, released Sunday morning, with 23 percent.

Sen. Marco RubioMarco Antonio RubioOvernight Cybersecurity: What we learned from Carter Page's House Intel testimony | House to mark up foreign intel reform law | FBI can't access Texas shooter's phone | Sessions to testify at hearing amid Russia scrutiny Cornyn: Senate GOP tax plan to be released Thursday This week: GOP seeks to advance tax overhaul MORE then has 12 percent to hold the third spot.

Both Cruz and Rubio saw their support fall slightly in the latest survey, by 4 points and 3 points, respectively.

No other GOP candidate has double-digit support, pollsters found.

Fox News quoted Republican pollster Daron Shaw, who conducts the poll with Democratic pollster Chris Anderson, as saying, “We tend to over-interpret every little thing in a presidential race, but here we actually have solid evidence Trump didn't just win last week in Iowa -- he won it by enough to put some distance between himself and Cruz.”

The poll of 378 likely Republican caucus-goers, conducted Jan. 18-21, has a 5 percent margin of error.

The Fox News Poll also shows Trump holding his lead in New Hampshire with 31 percent support. Cruz follows with 14 percent while Rubio has 13 percent.