Key Speakers At The Conservative Political Action Conference [Getty Images]

Scott Walker, governor of Wisconsin, speaks during the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, U.S., on Thursday, Feb. 26, 2015. The 42nd annual CPAC, which runs until Feb. 28, features most of the potential Republican candidates for president, from Ben Carson and Carly Fiorina to Jeb Bush and Scott Walker. Photographer: Andrew Harrer/Bloomberg via Getty Images

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