Barack Obama: “We want everybody to go to the polls now and go early and we're going to make sure your vote is counted.”

The success of this experiment was never a given.

Helped lead some of the most significant movements for change in human history

We’ve now fought a war, spent billions and billions of dollars, you know, put enormous strain on our military. A lot of people have died. And it feels like we’re back where we were before we started the war, except maybe a little bit worse…

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.