The thing about the stand was that the villain, Flagg, was part of the '60s counter-culture while the heroine was a black, female religious Republican and Reagan voter.
I loved "The Stand" The only book that ever "really creeped me out": First read it at the runup to the first Gulf War, and during a really rough, weird time in my own life; I was beginning to think that maybe King was a Prophet ;-)
His writing got really weird after his being run-over and nearly dying; I always figured it was the drugs at first, then the withdrawal from them. "DreamCatcher" sure seemed really drug induced to me. By the end of "The Dark Tower" series, he seemed back to "normal" (Stephen King normal, that is.)
I read Insomnia, but don't remember a thing about it. Beyond that, I haven't noticed any "flaming liberalism" in his books, and I'm usually pretty sensitive to that sort of thing, even when it is subtle.
Too bad he is a liberal in his personal life, but at least he apparently puts his money where his mouth is.