David Axelrod: “If people sense that you just blew off the question or ... in order to get to your attack, it goes very badly.”

I moved on, like many others who simply ignored him.

There's no doubt about that. But I also want to say this. You know, all presidents sort of feed off of perceptions of the person who came before and they want to position against what people found lacking in the person that came before.

The nature of presidential politics is the bar gets raised constantly.

The place where it has influenced politics is in Canada. Now, Justin Trudeau is not -- he's stepping down. He's going to step down. But there's going to be an election in the next few days for the new Liberal Party leader and then there…