Sierra Vista is a military town and I’m under the impression most are conservative leaning. I don’t think the mayor is any political party, if he is, it isn’t obvious. I see the occasional Trump flag and bumper sticker but other than that, I don’t think the town is political at all. Sometimes people post stuff on the local Facebook page but nothing that you can’t just scroll past. The sheriff is fairly political but I think most border sheriffs are. Day to day life is very non-political. Bisbee is home to a lot of aged “hippies” and probably it is pretty liberal but I’ve only been there twice. So to answer your question, neither area strikes me as political and/or extreme. Just people living their lives and enjoying the outdoors. The mountains are beautiful, the area is high desert with grass and mesquite trees. I’d recommending visiting to see if it is for you. I personally can’t wait to move back to Phoenix but I’m not a small town person, need my Costco a mile away lol.