You have a right to wear your bush shirt where you want. I personally would avoid wearing politcal shirts at Disney because I know if I did it would offend half the people there (I'm a Kerry supporter) and I see no reason to intentionally irritate people at such a happy place...but that's just me. My parents taught me (and I believe they are correct) that there are three subjects that should be handled carefully and not brought up in the company of people you don't know well: sex, religion and politics. Of course, it is America, and you have a right to wear your political clothing. My personal take on it is this: Why bring politics into Disney? Wouldn't it be nice to just have a vacation where everybody can just "be" without highlighting the things that have divided America? Just let it go for a few days and have a happy vacation without worrying about the election.