Rep. Ron Paul. Patrick Smith/Getty Images hide caption

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Republican presidential candidate former Massachusetts Gov. Mitt Romney, right, makes a point as Texas Gov. Rick Perry listens, during a debate in Orlando, Fla. Phelan M. Ebenhack/AP hide caption

itoggle caption Phelan M. Ebenhack/AP

Republican presidential candidate and Texas congressman Ron Paul at Iowa State University in Ames on Aug. 13, 2011. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images