Sen. John McCain, Arizona Republican, reacts to the delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

Sen. John McCain, Arizona Republican, reacts to the delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)