 If they interrupt Trump way too much, they're going to get eaten up. But also, in fairness to them, if they ask a question and the candidate refuses to answer the question, that's part of a politician's training for a debate is answer the question you want to answer, not what the moderator wants you to answer. If they push on that, they might win some plaudits from the public for trying to push these guys to answer questions. It is a very tricky thing to do, particularly in such a divided world.