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UNITED STATES - Oct 30: Senators Lamar Alexander, R-TN., Richard Burr, R-NC., and David Vitter, R-LA., talk shop on the way to the floor of the U.S. Senate via way of the subway in the U.S. Capitol on October 30, 2013. (Photo By Douglas Graham/CQ Roll Call)

UNITED STATES - Oct 30: Senators Lamar Alexander, R-TN., Richard Burr, R-NC., and David Vitter, R-LA., talk shop on the way to the floor of the U.S. Senate via way of the subway in the U.S. Capitol on October 30, 2013. (Photo By Douglas Graham/CQ Roll Call)

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