Democracy is hard work.

Sustaining the energy and focus involved in doing a good job I think starts to - starts to gets tougher the longer you do it.

Part of what's unique about climate change, though, is the nature of some of the opposition to action. It's pretty rare that you'll encounter somebody who says the problem you're trying to solve simply doesn't exist. When President Kennedy set us on a course for the moon, there were a number of people who made a serious case that it wouldn't be worth it; it was going to be too expensive, it was going to be too hard, it would take too long. But nobody ignored the science. I don't remember anybody saying that the moon wasn't there or that it was made of cheese.

I've said repeatedly that where we see terrorist organizations like al-Qaeda or ISIL, they have perverted and distorted and tried to claim the mantle of Islam for an excuse, for basically barbarism and death. These are people who kill children, kill Muslims, take sex slaves - there's no religious rationale that would justify in any way any of the things that they do.

People call me a socialist sometimes. But, no, you gotta meet real socialists. You'll have a sense of what a socialist is.

I have been to this point unwilling to sign on to same-sex marriage primarily because of my understandings of the traditional definitions of marriage. But I also think you're right that attitudes evolve, including mine.

Political gerrymandering makes the incentive for most members of Congress to play to the extremes of their base rather than to the center.