I really hope the moderators keep him in check during debates, his go-to when backed into a corner is to interrupt, talk over, and insult. While Clinton is a pretty assertive politician, there's no way she's going to engage in a shouting/insult match. So if he's just railing into her all debate, she'll end up looking pretty weak and he'll 'win' the debates. Remember, a good portion of our population gives no shits about facts and policies.