I thought he was going to slug her during the last debate. You know, the way Nicholson went after Nurse Ratched!
Slugging her is the last thing he wants to do. Striking a woman is reprehensible. However, making Hillary lose her temper so she lets loose her inner demon, the one that tells the Secret Service to “F-— off” would be the best outcome by far.
She is already unlikable, coming across as unstable under pressure (which I believe she is) would be politically fatal.