A large primary field may fragment the vote, making it unlikely that a candidate could win a majority and avoid a runoff and making it easier for Moore to advance to a runoff with only the support of his base. The point is that Moore does have a path — especially a path to a primary runoff if there’s a crowded GOP field. And if he does get there, he would be only one step away from a rematch with Jones. Moore would still have a decent chance of winning a general election in conservative Alabama, and that is surely...