I think Obama is right when he talks about the rule of law as a cornerstone of what the United States should stand for.

My second epiphany came as an intern at the Carnegie Endowment for International Peace. The man I worked for was consumed with what was going on in Bosnia. And the more I knew [about it] the more saddened I was. There were these images of emaciated men behind barbed wire.... It was like, I've got to find a way to do something.

When I wake up in the morning, I think about Syria.

As even a democracy like the United States has shown, waging war can benefit a leader in several ways: it can rally citizens around the flag, it can distract them from bleak economic times, and it can enrich a country's elites.

In general, my rule is find out where your heart is, then speak from the heart. People know the difference between that and something scripted.

I think we do have an interest in combating states that try to cross borders and steal parts of other people's country.

The story of U.S. policy during the genocide in Rwanda is not a story of willful complicity with evil. U.S. officials did not sit around and conspire to allow genocide to happen.