I think the Bible states that we should obey government authorities since they were placed there by God. But I have a hard time believing that God would choose a heretic, or any non-Catholic for that matter, over a Catholic as a government official. It's possible that we should still obey them for moral reasons. At the same time, I can see how we might not be bound morally. When the antichrist comes would you obey him? I wouldn't.