That really sucks. I've had coworkers like that before, pretty much everywhere I've ever worked. There's always at least one.
I wish I had better advice for you. Usually with them, I just keep my head down and try to stay off their radar as much as possible.
The Herman Cain award made me sad. It's people who are just the right mix of stubborn, alienated, uneducated, and gullible to dig their heels into something that really made no sense. And then dying because of it.
I wish I was smart enough to find a way to help them instead, but I always get too frustrated talking with them before I even begin to get close.