I won't go into who I do or don't support, but I do have a problem with celebrities getting into politics unless they're running for office (i.e., are actually involved enough to put up or shut up). They have a high level of influence with many people that isn't based on any political expertise, and yet people will listen to their opinions on politics. I liked Dana Carvey's take on it, when asked why he refused to speak at a convention:
"Nothing good can come from it--the people listening are either smarter than me and will make fun of me, the same as me and won't pay attention, or dumber than me and they'll think I'm worth listening to! No matter which way it goes, the fact that I really don't know what I'm talking about is kind of a bad thing!"
This is not saying they can't have their opinions, but using their celebrity to get air time in a completely seperate venue doesn't sit well with me.
And, as far as the Dixie Chicks or anyone else goes, they are absolutely entitled to their opinion, but something that people who often cry the most about freedom of speech don't realize is that freedom of speech does not mean that surrounding people have to like you or what you say. The Chicks were not imprisoned, beaten, or spit on, nor was their property siezed. Following what they said, some people stopped buying their music, and others started buying more. Both of those acts by the people are freedoms of expression, which is something that is ALSO guaranteed.
Freedom is always really popular until it starts working against you...