Michael Bloomberg: “Somebody said, you know, that he's taller than me, he calls me Little Mike. And the answer is, Donald, where I come from…”

There is one aspect - approach that I delete - deeply regret, the abuse of a police practice called 'Stop-and-frisk.' I defended it, looking back, for too long, because I didn't understand then, the unintended pain it was causing to young…

It is a disaster. We have spent decades building trust and relationships, and the benefit of that is lots of people around the world, but Americans, we have not had a World War in 70 years.

There's no question about that. The COP21 agreement was designed in -- to favor America because the negotiators knew that it would be very hard, if not impossible, to get through an American Congress.

I think there are enormous problems. It would be an honor if people thought I could do something about them. And I'd love to have the opportunity to try.