i do notice a trend though. although most openly political actors are liberal, there are some conservatives. the thing is, the liberal actors always sound the same and often sound like morons (they go faaar left and make liberal ideology sound stupid as shit) and the conservative actors tend to not say much except some commentary on political occurences. this is helpful since it doesn't hurt conservatives (although, people like Rush Limbaugh and Anne Coulter do it a lot, by making it sound like Conservatives want a theocracy).
also, most of the openly conservative actors are tough guy actors:
Bruce Willis
Ah-nold
Sylvestor Stallone
Wilford Brimley
John Voigt
etc
so it's helpful for the image that conservatives try to make. the tough guys.
of course, i really don't care about any of their points of view. i'm simply analyzing what works and what doesn't, and when you listen to all of these liberal actors speak, it is not helpful at all. if anything, it only hurts (because most of the people who vote are actually smart enough to know when they hear bullshit).
one thing i found surprising was that Johnny Ramone was a Conservative who supported Bush. biggest shock in Punk besides the Straight Edge movement.
another thing is that since there is overwhelming Liberal ideology in Hollywood and the music industry, a conservative often attracts more interest.