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Former House Speaker Newt Gingrich, right, greets Rep. Ron Paul of Texas, second from left, as former Pennsylvania Sen. Rick Santorum, left, and former Massachusetts Gov. Mitt Romney watch before the start of a Republican presidential debate Wednesday, Feb. 22, 2012, in Mesa, Ariz. (AP Photo/Jae C. Hong)
Photo by: Jae C. Hong
Former House Speaker Newt Gingrich, right, greets Rep. Ron Paul of Texas, second from left, as former Pennsylvania Sen. Rick Santorum, left, and former Massachusetts Gov. Mitt Romney watch before the start of a Republican presidential debate Wednesday, Feb. 22, 2012, in Mesa, Ariz. (AP Photo/Jae C. Hong)

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