Republican presidential candidate former Utah Gov. Jon Huntsman descends stairs during an event at Virginia's on King restaurant, Jan. 15, 2012, in Charleston, S.C.
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Republican presidential candidates (L-R) Jon Huntsman, Herman Cain, Rep. Michele Bachmann, Mitt Romney, Gov. Rick Perry, Rep. Ron Paul, Newt Gingrich and Rick Santorum as they prepare to debate during the event sponsored by CNN and The Tea Party Express at the Florida State fairgrounds on September 12, 2011 in Tampa, Florida. The debate featured the eight candidates ten days before the Florida straw poll.
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Republican presidential candidate Jon Huntsman makes his way through the media as he leaves a polling station in Manchester, New Hampshire, Jan. 10, 2012.
Brent Clark / Wonderful Machine for TIME
Presidential hopeful Jon Huntsman campaigns at tailgate event before the University of South Carolina vs. Navy football game in Columbia, South Carolina, Sept. 17, 2011.
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Republican Jon Huntsman speaks to the media after announcing his bid for the presidency on June 21, 2011 in Jersey City, New Jersey.
Grant Cornett for TIME
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Republican presidential candidates, (L-R) former Utah Gov. Jon Huntsman, former U.S. Sen. Rick Santorum, former Massachusetts Gov. Mitt Romney, U.S. Rep. Ron Paul (R-TX), former Speaker of the House Newt Gingrich, and Texas Gov. Rick Perry gather on the stage prior to the NBC News Facebook Debate on 'Meet the Press' January 8, 2012 at the Capitol Center for the Arts in Concord, New Hampshire.
Jim Cole / AP
Republican presidential candidate Jon Huntsman has said that conservation is conservative and he is not ashamed to be a conservationist
Douglas C. Pizac / AP
Utah Governor Jon Huntsman looks up after signing a document to fight global warming
Brooks Kraft / Corbis for TIME
Former U.S. ambassador to China and possible Republican presidential candidate Jon Huntsman attends the Nashua Republican Committee Picnic in Hollis, New Hampshire, June 13, 2011.