McCain still has 2 years to the election..and if he is elected, a minimum of 4 years... he is 70 now...if he were elected and served 2 terms, he'd be 80. That would be the oldest... Pretty strenuous work, even for a guy who has survived a LOT.

I dunno...but if he were nominated, it would be kinda important to see who is chosen as his running mate.