Can a Christian be Demon-possessed?

Believe it or not, I am sometimes asked the question “Can a Christian be demon-possessed?” Not often, admittedly, since our culture declares that demons do not exist, and that anyone who imagines that demons do in fact exist should probably be locked up and not let out with their keeper. Belief in angels is sometimes allowed (though presumably not by people like atheistic Richard Dawkins), because that belief makes us feel good,…