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Rick Santorum celebrates with his wife Karen Garver Santorum as they hear Iowa Caucus voting results during a private backstage party at a caucus rally in Johnston, Iowa, January 3, 2012 (Credit: Reuters/John Gress)

Rick Santorum celebrates with his wife Karen Garver Santorum as they hear Iowa Caucus voting results during a private backstage party at a caucus rally in Johnston, Iowa, January 3, 2012 (Credit: Reuters/John Gress)