We got an international coalition [against Iran], and we imposed that. It was slow, patient diplomacy, nothing at all particularly headline-worthy. But then you got to the point where the negotiations - which I started and Secretary [John] Kerry completed - I think made the world safer.

I believe in a zone of privacy.

It's true that America can't solve every problem, but I don't know of any major problem in the world that can be solved without us.

If I didn't kick his ass every day? he wouldn't be worth anything.

I'm not a robot - I don't do the robot stuff, yeah.

Don't let anyone tell you that great things can't happen in America... Barriers can come down. Justice and equality can win.

I have won elections and I have lost elections.