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.

Engaging Iran won't guarantee improved U.S.-Iranian relations or a more stable Gulf region. But not engaging means more of the same.

We, as Americans, have an interest in ensuring that the only people who get to vote for our elected leaders are our citizens, and not some foreign people who think that they have an interest in skewing our election in one direction or another.

There is a fair amount of competition, obviously, with ISIL and the terrorist networks around the world, China also posing a different kind of threat to the rules-based order.

I think that the only time we will really know what then-President Trump is going to do about the set of challenges that confront him is after he has sat down with his advisers as the commander in chief, when he's looking at the threats and the intelligence from the standpoint of being the number one decider, when he's hearing from his secretary of defense, his chairman, who was the same chairman President Obama had, Chairman Joe Dunford, who is an outstanding public servant, who has led our anti-ISIL effort, on which we're making great progress.

Historical hypocrites have themselves carried out the very human rights abuses that they suddenly decide warrant intervention elsewhere.

In the '90s, there was scant presidential leadership and insufficient domestic political mobilization for foreign policy grounded in human rights.