Things change pretty rapidly. But they don't change inevitably. They change because you work for it.

Even when our heart aches, we summon the strength that maybe we didn't even know we had, and we carry on; we finish the race.

For the sake of our security, our economy and our planet, we must have the courage and commitment to change.

I don't want ever to be a president who is comfortable and at ease with killing people.

This kind of game in which anybody who I know, regardless of how flimsy the relationship is, that somehow their ideas could be attributed to me, I think the American people are smarter than that. They're not going to suggest somehow that that is reflective of my views, because it obviously isn't.

There's so much active misinformation and it's packaged very well and it looks the same when you see it on a Facebook page or you turn on your television. If everything seems to be the same and no distinctions are made, then we won't know what to protect.

We have come from a time of the large-scale, planned, Al Qaeda-style attacks, to the encouragement of lone wolves: Fort Hood, Chattanooga. To the encouragement of people to act on their own.