Members of the audience look on as Republican presidential candidates participate in the Republican Party presidential candidates debate in Sioux City

 
Members of the audience look on as Republican presidential candidates participate in the Republican Party presidential candidates debate in Sioux City
Members of the audience look on as Republican presidential candidates former U.S. Senator Rick Santorum (R-PA), Texas Governor Rick Perry, former Massachusetts Governor Mitt Romney, former U.S. Speaker of the House Newt Gingrich (R-GA), U.S. Representative Ron Paul (R-TX), U.S. Representative Michele Bachmann (R-MN), and former Governor of Utah Jon Huntsman participate in the Republican Party presidential candidates debate in Sioux City, Iowa, December 15, 2011. REUTERS/Jim Young (UNITED STATES - Tags: ELECTIONS POLITICS)