Barack Obama: “The pursuit of tough, principled, direct diplomacy has been and must again be a hallmark of effective U.S. foreign…”

Every president here today, as different as we are, has tried our best to uphold the values that John McCain and Mitt Romney believed in no less than I did.

That's what I hope every visitor to this center takes away from their experience.

That was fantastic. I was a little tall for it.

Your task is not to impose litmus tests.