2016 Republican presidential candidates Rick Santorum, former senator from Pennsylvania, from left, George Pataki, former governor of New York, Senator Rand Paul, a Republican from Kentucky, Mike Huckabee, former governor of Arkansas, Senator Marco Rubio, a Republican from Florida, Senator Ted Cruz, a Republican from Texas, Ben Carson, Donald Trump, president and chief executive of Trump Organization Inc., Jeb Bush, former governor of Florida, Scott Walker, governor of Wisconsin, Carly Fiorina, former chairman and chief executive officer of Hewlett-Packard Co., John Kasich, governor of Ohio, and Chris Christie, governor of New Jersey, stand on stage during the Republican presidential debate at the Ronald Reagan Presidential Library in Simi Valley, California, U.S., on Wednesday, Sept. 16, 2015. The main debate of the top 11 GOP contenders in the polls follows the "kids' table" debate of candidates who didn't make the cut. Photographer: Patrick T. Fallon/Bloomberg via Getty Images
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