A group of about a dozen Ron Pauls supporters stand outside Hotel Blackhawk as Former Governor of Massachusetts and current Republican presidential candidate Mitt Romney departs on his bus. (Andrew Harnik / The Washington Times)
Former Governor of Massachusetts and current Republican presidential candidate Mitt Romney delivers a speech to kick off his Iowa bus tour. (Andrew Harnik / The Washington Times)
Former Governor of Massachusetts and current Republican presidential candidate Mitt Romney shakes hands with supporters at Hotel Blackhawk, Davenport, IA. (Andrew Harnik / The Washington Times)
Former Governor of Massachusetts and current Republican presidential candidate Mitt Romney delivers a speech to kick off his Iowa bus tour at Hotel Blackhawk, Davenport, IA , Tuesday, December 27, 2011. (Andrew Harnik / The Washington Times)
Republican presidential hopeful Mitt Romney is trying to convince voters he is the candidate who simply understands money and knows how to create jobs. Working against Mr. Romney is a long, sometimes puzzling record of changing positions that makes it hard to pin down his stances. (Associated Press)
Former Massachusetts Gov. Mitt Romney, a Republican presidential candidate, gets up on his soapbox to deliver a stump speech during a campaign stop at a feed store in Lancaster, N.H., on Thursday. (Associated Press)
Former Massachusetts Gov. Mitt Romney speaks during a campaign stop at the Stage Restaurant in Keene, N.H., on Wednesday, Dec. 21, 2011. (AP Photo/Matthew Cavanaugh)
Former Massachusetts Gov. Mitt Romney, a Republican presidential candidate, greets supporters as he arrives at a campaign stop at the Stage Restaurant in Keene, N.H., on Wednesday. Mr. Romney is kicking off a three-day "Earn It" bus tour of the state. (Associated Press)
PIZZA PARLOR POLITICIAN: Former Massachusetts Gov. Mitt Romney, a Republican presidential contender, shakes hands with patrons while campaigning at Village Pizza in Newport, N.H. (Associated Press)
Former Massachusetts Gov. Mitt Romney, a Republican presidential candidate, greets supporters as he arrives at a campaign stop at the Stage Restaurant in Keene, N.H., on Wednesday. Mr. Romney is kicking off a three-day "Earn It" bus tour of the state. (Associated Press)
PIZZA PARLOR POLITICIAN: Former Massachusetts Gov. Mitt Romney, a Republican presidential contender, shakes hands with patrons while campaigning at Village Pizza in Newport, N.H. (Associated Press)
Republican presidential candidate Mitt Romney waves as he wife, Ann, applauds after a campaign speech in Bedford, N.H., on Tuesday. Mr. Romney indicated that he favors campaigns themselves being able to accept and spend donations of any size. (Associated Press)
Former Massachusetts Gov. Mitt Romney speaks during a town-hall meeting on Saturday, Dec. 17, 2011, in Charleston, S.C., while campaigning for the Republican presidential nomination. (AP Photo/Rainier Ehrhardt)
Former Massachusetts Gov. Mitt Romney arrives for a rally at Missouri Valley Steel in Sioux City, Iowa, on Friday, Dec. 16, 2011, in his bid for the Republican presidential nomination. (AP Photo)
Republican presidential candidate and former House Speaker Newt Gingrich (center) speaks Dec. 15, 2011, as former Massachusetts Gov. Mitt Romney (left) and Texas Rep. Ron Paul listen during a Republican presidential debate in Sioux City, Iowa. (Associated Press)
Martha MacCallum interviews former Massachusetts Gov. Mitt Romney, a Republican presidential candidate, on the Fox News. Mr. Romney is taking some heat for trying to make a $10,000 bet with Texas Gov. Rick Perry at Saturday's debate. (Associated Press)
**FILE** Republican presidential candidate former Massachusetts Gov. Mitt Romney, left, gestures during a speech as New Jersey Gov. Chris Christie listens at a fundraising event in Parsippany, N.J., Monday, Dec. 12, 2011. (AP Photo/Rich Schultz)
Former Massachusetts Gov. Mitt Romney (left) and former Speaker of the House Newt Gingrich take part in the Republican presidential debate on Saturday, Dec. 10, 2011, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Former Massachusetts Gov. Mitt Romney (left) and former House Speaker Newt Gingrich talk during a break in the Republican presidential debate on Dec. 10, 2011, in Des Moines, Iowa. (Associated Press)