CHARLES KRAUTHAMMER (CONTRIBUTOR): Trump says that he would, or he was asked, would you kill the relatives of terrorists? Trump I thought would deny it and would fudge. He didn't. He essentially said yes. Bush muffed the answer. That is an unbelievably irresponsible, semi-insane policy, and Bush swung and missed. It was actually Rand Paul who picked it up in the next question in saying it was essentially ridiculous to even talk about that.

BILL O'REILLY (HOST): Okay.

KRAUTHAMMER: Because you'd have to tear up the Geneva Conventions.