President Obama tours Conveyor Engineering and Manufacturing in Cedar Rapids, Iowa, on Wednesday. Jewel Samad/AFP/Getty Images hide caption

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Republican presidential candidates at the "Thanksgiving Family Forum" in Des Moines on Nov. 19, 2011. Brad Horn/NPR hide caption

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How much is it worth?

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Republican presidential candidates participated in the Iowa GOP/Fox News Debate at the CY Stephens Auditorium in Ames, Iowa, Thursday. From left, former Sen. Rick Santorum (R-PA); businessman Herman Cain; Rep. Ron Paul (R-TX), former Massachusetts Gov. Mitt Romney; Rep. Michele Bachmann (R-MN); former Minnesota Gov. Tim Pawlenty; former Utah Gov. Jon Huntsman; former House Speaker Newt Gingrich. Charlie Neibergall/AP hide caption

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