Check out how campaign manager Rick Davis handles the question from Fox's Chris Wallace:
WALLACE: Is there any chance
that Senator McCain will pledge to serve only one term as president and
that there will be no politics in the White House?
Well, first of all, if you know John McCain, you know there's not going
to be much politics in the White House anyway. I mean, he doesn't grade
any of his decisions either as a senator or in the future as president
on what the political dynamic is. You
look at his history, whether it's campaign finance reform, or opposing
this administration on detainee abuse and things like that, he does
what he thinks is right for the country, and he's going to do that
throughout his career no matter what office he holds.
But is there any possibility, because I didn't get an answer there — is
there any thought — is there any possibility that he would consider
issuing a pledge, say, at the Republican convention, "I will serve one
term as president?"
Chris, you're going to have to come to the Republican convention to
find out what's going to happen there. And I think everybody should
tune in, because it's going to be an excellent event and very
interesting to all viewers.
WALLACE: You're not ruling it out.
DAVIS: I'm not talking about it at all.