You don't see it - perhaps you don't have brains?
Lookie here: If McCain - and you truly believe that this is the guy who is going to lead us to victory in 08, then he is going to vacate that seat upon ascending to POTUS.
So with that scenario the issue is moot.
If you - and he - do not actually believe that McCain is going to win, then withdraw NOW. - Why run if you don't believe that you are going to win and achieve victory for us?
A beauty contest?? - No, this is for all of the marbles, so put up or go back to the Senate.
As far as him losing the election and being replaced for a couple of years by a dem... well, other than caucus numbers, who will really notice besides his buddy Kennedy?
you want him to resign so the seat will go to a democrate ....did you fall on your head....