That's an interesting point. Vietnam vets have been so stigmatized, mainly by the left for political reasons, as tragic burnouts and above all as pathetic victims. A McCain presidency would probably help undo that.
Btw, isn't it funny how in 2004 being a Vietnam vet and a "war hero" was, to liberals, the ultimate credential for a presidential candidate? Yet just four later they seem almost totally disinterested in the fact that we have a true Vietnam war hero in McCain. In fact it's not uncommon to see his POW status mocked on the lefty forums. Funny how fashions change like that.