Barack Obama went high, despite Donald Trump's best efforts to bring him down.

I certainly think the free-market has failed.

We are not putting ground troops into Iraq ever again. And we're not putting ground troops into Syria. We're going to defeat ISIS without committing American ground troops.

I think that, given the threat that ISIS poses to the region and beyond, as we have sadly seen in our own country, it is important to keep the Iraqi army on a path where they can actually take back territory, to work with the Sunni tribes in Anbar province and elsewhere so that their fighters can be also deployed, to work with the Kurds to provide them the support, but they're doing the fighting. We're doing the support and enabling.

I was somewhat confused when senator [Bernie] Sanders said, well, you know, Planned Parenthood and Human Rights Campaign, they`re part of the establishment.

We got to think of something for people to do.

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.