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UNITED STATES - July 18: Sen. John McCain, R-AZ., makes his way to the Senate policy luncheons through the Senate subway in the U.S. Capitol on July 18, 2013. (Photo By Douglas Graham/CQ Roll Call)

UNITED STATES - July 18: Sen. John McCain, R-AZ., makes his way to the Senate policy luncheons through the Senate subway in the U.S. Capitol on July 18, 2013. (Photo By Douglas Graham/CQ Roll Call)

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