In 2000, Grampa McCain joked that he’d be too old to run for president in 2008.

Thinkprogress:

On Aug. 1, 2000, Sen. John McCain (R-AZ) appeared on PBS’s Newshour with Jim Lehrer. When asked about the possibility that he might run for president in 2008, McCain said that he would probably be too old:

LEHRER: Finally for the record, you have not lost your desire to be President of the United States have you?

McCAIN: Certainly it’s been put in deep cold storage. haha..

LEHRER: You haven’t lost it?

McCAIN: Well, in 2004, I expect to be campaigning for the reelection of President George W. Bush, and by 2008, I think I might be ready to go down to the old soldiers home and await the cavalry charge there.