We don't want the smoking gun to be a mushroom cloud.

Well, there are many things, whenever you look back, that you would've done differently. We're all human. We do our best at the time. I really wish that we had passed a comprehensive immigration bill because that would've really helped our country. We came close, but we couldn't.

I believe in having a private life.

We [USA] need to deal with our problems here at home if we're going to be strong enough to lead abroad.

Multilateral diplomacy is hard. It's slower, it's tougher, it's a bigger slog. I've learned that sometimes the things you'd most like to do something about, you really have difficulty unless the international community really mobilizes.

The U.S. has since the end of World War II had an answer - we stand for free peoples and free markets, we are willing to support and defend them - we will sustain a balance of power that favors freedom.

What you know today can affect what you do tomorrow, but not what you did yesterday.