I am out in the sense of someone who has often said, "Mom, how many times do I have to tell you that I am not interested in dating a girl? Stop trying to hook me up." However, I really never raise the issue with people because, if they don't know me personally, I don't have to tell them. If they know me for long enough, they will find out eventually.
That said, I am a Democrat, and that has everything to do with the fact that I am relatively lax and "whatever" on this issue. I do not think that I would be nearly as confident in myself or relaxed if the company I kept had more conservative politics. If I were a Republican and all my colleagues, friends and family were Republicans, I would be either in the closet (and accordingly neurotic) or a bullhorn-toting activist. You will notice that Log Cabin Republicans can be the most neurotic, self-conscious, "I have to tell everyone I'm gay" jackasses around.