I'm worried about the world because of nuclear proliferation.

We need to inject some old-fashioned American values and common-sense, practical thinking into our energy policy.

The public is upset. If they haven't lost their job, they know somebody that has. If they haven't lost their house, they know somebody that has. What do you do? When something's wrong, it's government's job to fix it, it must be government that's responsible for causing it.

There will be ups, there will be downs, there will be sideways. I can just tell you I have been hired, I have been fired, I have been lauded, I have been vilified. I've said some of the most brilliant things that just by accident appeared on my tongue, and I've said some of the dumbest things that you could imagine. But each day - even the day that I knew I was going to be fired - I looked forward to because I've always believed that tomorrow was going to be the best day of my life.

Unemployment in America today is too high. And part of the reason, unfortunately, is that many companies cannot fill the high-skilled jobs increasingly at risk of going overseas.

I'm worried about the world because there's chaos in the Middle East, and I think the Iranian deal [to lift sanctions] is going to continue the Shia-Sunni battles, the Persian-Arab battles.

We're America, and we have to stop worrying about what happens overseas, and to be optimistic, even though nobody should think we're not going to have some difficult times.