Republican Senator Rand Paul To Announce Presidential Campaign [Getty Images]

U.S. Senator Rand Paul, a Republican from Kentucky, speaks during a rally to formally announce his presidential campaign at the Galt House hotel in Louisville, Kentucky, U.S., on Tuesday, April 7, 2015. Paul, 52, becomes the second Republican, and second freshman senator to join the 2016 presidential race. Photographer: Daniel Acker/Bloomberg via Getty Images

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