Tonight, let us think back to the sense of unity that prevailed on 9/11.

There are a lot of very religious scientists around. I think the problem here is that in our school systems, and to some degree - and this is where it is relevant - with school boards around the country that are mandating curriculums and textbooks, you start seeing this weird watering down of scientific fact so that our kids are growing up in an environment - and this connects to what I was saying earlier abou the media - where everything's contested. Where nothing is true.

Instead of giving in to cynicism and division, let's move forward with the confidence and optimism and unity that define us as a people.

We have a choice. We can shape our future, or let events shape it for us. And if we want to succeed, we can't fall back on the stale debates and old divides that won't move us forward.

The one thing I've said to [Donald Trump] directly, and I would advise my Republican friends in Congress and supporters around the country, is just make sure that, as we go forward certain norms, certain institutional traditions don't get eroded, because there's a reason they're in place.

I would meet directly with the leadership in Iran.

If you want to know who we are, who America is, how we respond to evil-that's it: selflessly, compassionately, unafraid.