I think both of them [Donald Trump and Bernie Sanders] have [chances] because they are not the establishment, not for who they are.

When you go to Washington now, you can feel a sense of fear in the air - the fear to do anything, or say anything, that might affect the polls, or give the other side an advantage, or offend a special interest.

Go walk the streets of Beijing. It's pretty hard to argue it isn't a modern city. Now, if you go outside [of Beijing], in the rural areas, that's true. But rural America, you can say the same thing, in Appalachia there's an awful lot of poverty and lack of education.

When I care about something, I care about something. I think I have an obligation as an American to - and as a citizen, as - as a human being, to help others. Smoking is going to kill a billion people this century. I've put six hundred million dollars from my own money into trying to stop the tobacco companies from getting kids to smoke and convincing adults that it's not in their health.

Donald Trump says he wants to run America like he's running his business? God help us.

Fifty percent of the world's population lives in cities. In a couple of decades, 70 percent of the world's population will be living in cities. Cities are where the problem is. Cities are where the solution is, where creativity exists to address the challenges and where they have most impact. This is why, in 2005, the C40 was founded, an organization of cities that address climate change. It started with 18 cities; now it's 91. Cities simply are the key to saving the planet.

Leading from the front: It's what built America. But these days, the federal government isn't at the front - it's cowering in the back corner of the room, ducking responsibility and hoping no one notices.