Mitt Romney, former Mass. governor

Minn. Rep. Michele Bachman

Tim Pawlenty, former Minn. governor

Sarah Palin, Fox News contributor

Herman Cain, former CEO of Godather's Pizza

Newt Gingrich, former Speaker of House

Texas Rep. Ron Paul

Gary Johnson, former N.M. governor

Rudy Giuliani, former New York mayor

Rick Santorum, former U.S. Senator

Rick Perry, Texas governor

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