Wisconsin Gov. Scott Walker offers cheese and ice cream to guests in his hospitality room at the Iowa Lincoln Day Dinner in Des Moines on Saturday. Charlie Neibergall/AP hide caption

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HANOVER, NH - OCTOBER 11: (L-R) Jon Huntsman, U.S. Rep. Michele Bachmann (R-MN), Texas Gov. Rick Perry, Herman Cain and Mitt Romney laugh during the Republican Presidential debate hosted by Bloomberg and the Washington Post on October 11, 2011 at Dartmouth College in Hanover, New Hampshire.

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