Of course, of course. But they are only about a half decade apart. IIRC Fred is 65 and McCain 71.
If McCain gets the nomination, my guess is that he'd want someone in his 50s. Just MHO.
Why? Because Fred is too old...and too tired...and doesn’t have any fire in the belly? (I’m so glad this is the only argument people can use against him).
Besides...I don’t believe Fred would take the job of running-mate with McCain, they have differing views that would stand in the way.
Fred is in this to be President...not VP