He certainly will not rely on the facts of his Senate record, but he will act insulted if the questions are raised.
The central technique of his campaign has been to accuse the opponents of smear tactics at any criticism.
I've often thought that "for three whole months . . .", "for three whole months . . .", "for three whole months . . ." would be an excellent response. how much of the public thinks he pulled two or three tours of duty in viet nam?
of course, the problem with that response is that it would seem ungrateful to anyone who served, and that is VERY unlike bush.