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WASHINGTON, DC - MAY 31: Sen. Rand Paul, R-Ky., arrives in the U.S. Capitol for votes on extension of provisions of the Patriot Act on Sunday, May 31, 2015. Sen. Paul has vowed to block the extension. (Photo By Bill Clark/CQ Roll Call)

WASHINGTON, DC - MAY 31: Sen. Rand Paul, R-Ky., arrives in the U.S. Capitol for votes on extension of provisions of the Patriot Act on Sunday, May 31, 2015. Sen. Paul has vowed to block the extension. (Photo By Bill Clark/CQ Roll Call)

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