Rand Paul

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U.S. Sen. Rand Paul, R-Ky., holds his phone while speaking before the Berkeley Forum, Wednesday, March 19, 2014, in Berkeley, Calif. (AP Photo/Ben Margot)

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U.S. Sen. Rand Paul, R-Ky., speaks before the Berkeley Forum, Wednesday, March 19, 2014, in Berkeley, Calif. (AP Photo/Ben Margot)

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U.S. Sen. Rand Paul, R-Ky., speaks at the Berkeley Forum, Wednesday, March 19, 2014, in Berkeley, Calif. (AP Photo/Ben Margot)

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Sen. Rand Paul, Kentucky Republican, came out as the favored Republican candidate for a White House run in 2016 in a recent CNN/ORC poll, garnering 16 percent of the support. (Associated Press)

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Sens. Ted Cruz and Rand Paul share the stage on behalf of the Republican Party. Both will speak on conservative strengths at an upcoming summit. (Associated Press)

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Sen. Rand Paul (R-Ky.) speaks at the Conservative Political Action Conference (CPAC) held at the Gaylord Hotel, National Harbor, Md., Friday, March 7, 2014. (Andrew Harnik/The Washington Times)

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National Edition News cover for March 9, 2014 - Rand Paul wins 2014 CPAC straw poll, Ted Cruz finishes a distant second: Sen. Rand Paul, R-Ky., speaks at the Conservative Political Action Committee annual conference in National Harbor, Md., Friday, March 7, 2014. Friday marks the second day of the annual Conservative Political Action Conference, which brings together prospective presidential candidates, conservative opinion leaders and tea party activists from coast to coast. (AP Photo/Susan Walsh)