I’ve been studying the Lutheran doctrine of the Two Kingdoms, which has some interesting applications to our controversies today. Christian defenders of Donald Trump are saying that his sexual transgressions show that he isn’t a saint. But he is well-suited to the pragmatic, rough-and-tumble world of secular government, and that’s what we need in a presidential candidate.
Well, according to the doctrine of the Two Kingdoms, God’s spiritual Kingdom is ruled by the Gospel, but His earthly Kingdom is ruled by the Law. That is to say, morality does apply precisely to secular government.
UPDATE: Specifically, the first use of the Law, the civil use, which curbs external vices. Though it cannot justify or get at our internal sinfulness, it restrains the outward expression of that sinfulness. Such restraint and self-control can be practiced, to a certain extent, by all members of society, which depends on some kind of moral order.