We haven't had a world war in a long time. We do have mass movements of people out of Syria and North Africa. But, fundamentally, if you take Japan, you're complaining that the economy isn't booming, they'd like to have slightly higher inflation.

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

I thought Jeb Bush would have made a good president. He was on the board of my foundation. He's very conservative, much too conservative for me.

And I think the more money you put in people's hands, the more they will spend. And if they don't spend it, they invest it. And investing it is another way of creating jobs. It puts money into mutual funds or other kinds of banks that can go out and make loans, and we need to do that.

I think that most of the candidates [for presidency] can't run the railroad, and I still worry that whoever gets elected will have policies designed for political rather than practical reasons.

Fighting climate change isn't just an obligation we owe to future generations. It's also an opportunity to improve public health - and drive economic growth - in the here and now.

I think we are not serious about attacking the long-term debt problem, and that's one of the things that he's going to have to find a way to get on the agenda.