Where we get into problems, typically, is when our personal religious faith, or the community of faith that we participate in, tips into a sort of fundamentalist extremism, in which it's not enough for us to believe what we believe, but we start feeling obligated to, you know, hit you over the head because you don't believe the same thing. Or to treat you as somebody who's less than I am.

In order for us to compete with China, we've also got to make sure, though, that we're taking - taking care of business here at home. If we don't have the best education system in the world, if we don't continue to put money into research and technology that will allow us to create great businesses here in the United States, that's how we lose the competition.

Rand`s [Paul] a libertarian. He has a view of the world that I don`t share. He said that we shouldn`t have any troops in Iraq. He agreed with Obama that was a disaster. When there was a chance to do something constructive about Syria with a no-fly zone, he said we don`t need one.

I don't think there's a lot of dispute for this. You can argue that we didn't get everything done that we wanted to get done, but I can make a really strong argument, and I think prove, that by almost every measure the country's better off now than when I started.

I always say that campaigning and governing are two different things.

As the world's largest economy and second-largest carbon emitter, as a country with unsurpassed ability to drive innovation and scientific breakthroughs, as the country that people around the world continue to look to in times of crisis, we've got a vital role to play. We can't stand on the sidelines. We've got a unique responsibility.

In many ways [those middle-aged black ladies] my touchstone, because they are what I meant when I talked about the audacity of hope.