Will there ever be a debate where someone actually answers a quesiton?

I hate watching the debates because all it is is finger pointing at the other candidate, or jabbering on about something that has nothing to do with the question. Why can't they just answer a question??? Why can't the moderator stop them from rambling and just make them answer the question. Threaten if they don't just answer, that they will be kicked out of the debate. I understand explaining your position, but only after answering.