Republican presidential candidates pose for a photo before the start of the Iowa GOP/Fox News Debate at the CY Stephens Auditorium in Ames, Iowa, Thursday, Aug. 11, 2011. Pictured from left to right: former Pennsylvania Sen. Rick Santorum; businessman Herman Cain; Rep. Ron Paul, R-Texas, former Massachusetts Gov. Mitt Romney; Rep. Michele Bachmann, R-Minn.; former Minnesota Governor Tim Pawlenty; former Utah Gov. Jon Huntsman; former House Speaker Newt Gingrich. (AP Photo/Charlie Neibergall)

Associated Press
Republican presidential candidates pose for a photo before the start of the Iowa GOP/Fox News Debate at the CY Stephens Auditorium in Ames, Iowa, Thursday, Aug. 11, 2011. Pictured from left to right: former Pennsylvania Sen. Rick Santorum; businessman Herman Cain; Rep. Ron Paul, R-Texas, former Massachusetts Gov. Mitt Romney; Rep. Michele Bachmann, R-Minn.; former Minnesota Governor Tim Pawlenty; former Utah Gov. Jon Huntsman; former House Speaker Newt Gingrich. (AP Photo/Charlie Neibergall)
Republican presidential candidates pose for a photo before the start of the Iowa GOP/Fox News Debate at the CY Stephens Auditorium in Ames, Iowa, Thursday, Aug. 11, 2011. Pictured from left to right: former Pennsylvania Sen. Rick Santorum; businessman Herman Cain; Rep. Ron Paul, R-Texas, former Massachusetts Gov. Mitt Romney; Rep. Michele Bachmann, R-Minn.; former Minnesota Governor Tim Pawlenty; former Utah Gov. Jon Huntsman; former House Speaker Newt Gingrich. (AP Photo/Charlie Neibergall)
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