When I came into office, people said, 'Billionaire? How do they live? What do they eat? How do they sleep?' Today, they see me on the subway coming uptown. A couple of people say hi, some people smile and nod. Some people just sleep. It's not an issue.

I cannot for the life of me understand why the American market keeps going up. Our economy has some real challenges. The infrastructure's falling apart. We're destroying jobs with technology. We are keeping the best and the brightest from around the world from coming to America to create new jobs and create new businesses. All of those things would give you pause to worry about the future.

I've always wondered if people who block each other from expressing their opinions do so because they have so little confidence in their own. To me, encountering an opposing point of view is a chance to gain a deeper understanding of the issues at stake and develop my own point of view. But the first thing you've got to do is you've got to let people speak and you've got to listen. And that's what the first amendment is all about. That's what really distinguishes this country from others.

You bet I did and I enjoyed it.

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.

If I remember, Russia, 20 or 30 years ago, you'd get shot trying to leave. Today, Russian tourists are all over the world. You have Russian oligarchs with big yachts all over the world.

The public is mad, frustrated, but what the public wants is progress.