John Mccain

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** FILE ** In this May 23, 2013, file photo Republican Senators Lindsey Graham, R-S.C., center, Sen. John McCain, R-Ariz., left, and Saxby Chambliss, R-Ga., right, take part in a Capitol Hill press conference in Washington to express criticism of President Barack Obama's speech on Afghanistan, terrorism, and the Guantanamo Bay prison. (AP Photo/J. Scott Applewhite, File)

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**FILE** Sens. Carl Levin (left), Michigan Democrat and Chairman for the Senate Homeland Security and Governmental Affairs Permanent subcommittee on Investigations, and John McCain of Arizona, the subcommittee's ranking Republican, arrive on Capitol Hill in Washington on May 21, 2013, for the subcommittee's hearing to examine the methods employed by multinational corporations to shift profits offshore and how such activities are affected by the Internal Revenue Code. (Associated Press)

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Sens. John McCain (left), Arizona Republican, and Charles Schumer, New York Democrat, walk from the West Wing of the White House to talk to the media in Washington on April 16, 2013, following a meeting with President Obama on immigration. (Associated Press) **FILE**

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Sens. John McCain, Arizona Republican, and Charles E. Schumer, New York Democrat, leave the White House after a meeting with President Obama on immigration. (Associated Press)

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**FILE** Republican Sens. John McCain (right) and Jeff Flake (left), both of Arizona, listen as Sen. Chuck Schumer, New York Democrat, talks prior to a news conference after their tour of the Mexico border with the United States on March 27, 2013, in Nogales, Ariz. (Associated Press)