Barack Obama: “That's not a Democratic or a Republican challenge, it's an American challenge.”

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

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.

A belief that our military and law enforcement owe allegiance not to any president or political party, but to the people and our constitution … a belief in the peaceful transfer of power

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