A critical question in elections is not so much how confirmed party members with long voting histories will behave, rather it is how those who don't think much about issues or implications will vote after they have seen the barrage of advertisements, appearances, and media coverage of the candidates.
The coming election will see a lot of effort attempting to influence that "crackpot voters", those who have little care for real issues and instead are concerned with bizarre or stupid interpretations of the candidates views, histories, and other aspects of the campaign.
I'm going to remain optimistic that this won't play a large role, given that the crackpot vote probably balances out fairly well between the candidates. Also, if the latest silly claims of "swiftboating" are any indication of the worse the campaigns have to offer each other we can remain hopeful that the election really will focus on issues rather than personal quirks, and voters will make their decisions wisely. Hmmm - that sounds way too optimistic.