2012 Republican presidential possibilities(9 images)

Though the list for the GOP nomination changes by the day, some candidates (and could-be candidates) are quietly gaining momentum in the crowded race. Here's a summary of the newest, loudest and most controversial Republican candidates.

Conservative radio talk show host Herman Cain's background is in business, not politics, making him a favorite of the Tea Party. He announced his candidacy on May 21 to an enthusiastic crowd in Atlanta. Here, Cain speaks at the Americans for Prosperity Foundation fourth annual "Defending the American Dream" summit in Washington on August 27, 2010. UPI/Alexis C. Glenn | License Photo
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