I think the most inspiring thing that Americans can do for the rest of the world is struggle against the evils in our own society.

Clinton is a very capable, conscientious person. I think she cares very deeply about policy. She knows a lot about how the government works, and I think those things are very important. You don't really appreciate those things until you get a guy like George W. Bush in the White House, and then you realize that when you don't have someone who knows or cares about government policy, a lot of bad stuff can happen.

There's a ton of academic literature that shows people are much more critical of female leaders than they are of male leaders. They're much less tolerant of female ambition, much more threatened by female power.

There's nothing wrong with being proud of America, believing that America can do great things. America can do great things, it has done great things. I think we have to have the self-awareness to recognize that the world is a very, very big place, that we could be a force for good things in the world, but we have to have the humility to recognize that sometimes even when we think we're acting from the best of motives our own idealism can be infected by self-interest. Other people in other countries can see it sometimes better than we can.

It's easy to see why conservatives would be salivating at the thought of a Hillary primary challenge. Presidents who face serious primary challenges—Ford, Carter, Bush I—almost always lose. The last president who lost reelection without a serious primary challenge, by contrast, was Herbert Hoover. But in truth, the chances that Obama will face a primary challenge are vanishingly slim, and the chances that he will lose reelection only slightly higher. No wonder conservatives are fantasizing about Hillary Clinton taking down Barack Obama. If she doesn't, it's unlikely they will.

When you talk about the security and safety of average Americans it doesn't do average Americans a lot of good to expand America's military footprint if the daily lives of average Americans are being undermined by the fact that we're no longer able to compete in a global economy. I think that's the kind of human security we have to pay more attention to.

Our sense of optimism, our can-do spirit, that's a source of great strength in America. But when there are no limits at all and we've gone through whole periods where we think everything has gone right, that's when disaster tends to strike.