FILE - In this March 28, 2012 file photo, Sen. John McCain, R-Ariz. listens during a news conference on Capitol Hill in Washington. McCain was the toast of the Republican convention fou

 

              FILE - In this March 28, 2012 file photo, Sen. John McCain, R-Ariz. listens during a news conference on Capitol Hill in Washington. McCain was the toast of the Republican convention fou
FILE - In this March 28, 2012 file photo, Sen. John McCain, R-Ariz. listens during a news conference on Capitol Hill in Washington. McCain was the toast of the Republican convention four years ago, the GOP's comeback kid crowned as the party's presidential nominee. He'll attend the 2012 party celebration Wednesday but won't stay for long. (AP Photo/Jacquelyn Martin, File)