Trump was asked about using nukes against ISIS. The GOP front runner proceeded to go on a tangent about his rivals’ attacks on him, and when asked again about nukes, he literally said, “This is a very good looking group of people here. Could I just go around so I know who the hell I’m talking to?” 

He totally dismissed the question because he obviously didn't know the answer: So Mitchell immediately reacted by saying, “He cannot stick to a subject, it is remarkable. And when he doesn’t know something, he just changes the subject, makes it all about himself.”