WASHINGTON--Keep an eye on Newt, the new front-runner in the Republican 2012 primary contest. The GOP presidential candidates debate for the last time Thursday night before the Jan. 3 Iowa vote at 9 p.m. est on FOX News channel.

The two hour debate in Sioux City--comes just after the Saturday night debate where Mitt Romney made what has been seen as a flub--offering a $10,000 bet to Rick Perry. The FOX News team: Bret Baier anchors. The panelists: Chris Wallace, host of FOX News Sunday, Megyn Kelly, anchor of America Live, and Neil Cavuto of Your World.

The candidates: Michele Bachmann, Newt Gingrich, Jon Huntsman, Ron Paul, Rick Perry, Mitt Romney, and Rick Santorum.