FILE - In this May 22, 2009, file photo Sen. John McCain, R-Ariz. waves as he is acknowledged by President Barack Obama at the United States Naval Academy graduation ceremony in Annapol

 

              FILE - In this May 22, 2009, file photo Sen. John McCain, R-Ariz. waves as he is acknowledged by President Barack Obama at the United States Naval Academy graduation ceremony in Annapol
FILE - In this May 22, 2009, file photo Sen. John McCain, R-Ariz. waves as he is acknowledged by President Barack Obama at the United States Naval Academy graduation ceremony in Annapolis, Md. Obama and McCain, the Republican he defeated in his first White House campaign, have become one of Washington's most talked about odd-couple pairings. And like any successful business deal in the nation's capital, the relationship works because it has benefits for both men. (AP Photo/Charles Dharapak, File)