Black children, white children, Latino children. America is becoming more diverse, it's becoming more tolerant as a consequence there's more interactions between groups. There are going be tensions that arise.

When we helped prevent the massacre of civilians trapped on a distant mountain, here's what one of them said: "We owe our American friends our lives. Our children will always remember that there was someone who felt our struggle and made a long journey to protect innocent people." That is the difference we make in the world.

Politics in this country [USA] is always tough. It's always contentious, because this is a big country and a diverse country, and people have strong points of view, and we've got a great diversity of interests.

America is the greatest country on Earth. But because of some of the mistakes that have been made, we, I think, are going to have a lot of work to do in the next administration to restore that sense that America is that shining beacon on a hill.

As a nuclear power - as the only nuclear power to have used a nuclear weapon - the United States has a moral responsibility to act.

We want to see the Iranians engage, and as you know, we have attempted to bring about that engagement over the course of the last three-plus years. It has not proven effective.

What I want to try to do is unify the two wings of the Democratic Party. What's considered the more progressive wing of the Democratic Party - the more centrist wing of the party. I think we can craft an approach that is more American, pro-worker, pro-business, pro-growth.