Senator Rand Paul, a Republican from Kentucky and 2016 Republican presidential candidate, right, and Chris Christie, governor of New Jersey and 2016 Republican presidential candidate, are seen on a television screen in the media filing center as they speak during the first Republican presidential debate at Quicken Loans Arena in Cleveland, Ohio, U.S., on Thursday, Aug. 6, 2015. The first Republican presidential debate featured front-runner Donald Trump at the literal and figurative center of the action, with the other nine candidates trading blows with him and each other as a packed arena in Cleveland cheered them on. Photographer: Andrew Harrer/Bloomberg via Getty Images