America, we weaken our ties when we allow our political dialogue to become so corrosive that people of good character aren't even willing to enter into public service; so coarse with rancor that Americans with whom we disagree are seen not just as misguided but as malevolent. We weaken those ties when we define some of us as more American than others, when we write off the whole system as inevitably corrupt, and when we sit back and blame the leaders we elect without examining our own role in electing them.

I think the American people, you know, they're going to want that new car smell. They want to drive something off the lot that doesn't have as much mileage as me.

That bright blue ball rising over the moon's surface, containing everything we hold dear - the laughter of children, a quiet sunset, all the hopes and dreams of posterity - that's what's at stake. That's what we're fighting for. And if we remember that, I'm absolutely sure we'll succeed.

In the campaign back in 2007, 2008, people would say, "Oh, he's being naïve. He thinks that there's no red states and blue states. And wait 'til he gets here." And I will confess that, I didn't fully appreciate the ways in which individual senators or members of Congress now are pushed to the extremes by their voter bases. I did not expect, particularly in the midst of crisis, just how severe that partisanship would be.

The values that we talked about, the values democracy and free speech and international norms and rule of law, respecting the ability of other countries to determine their own destiny and preserve their sovereignty and territorial integrity. Things are not something that we can set aside.

[With Donald Trump] we are moving into an era where a lot of people get their information through tweets and sound bites and some headline that comes over their phone.

Companies in Mexico are not going to do well if they don't have some connection to not just markets, but also suppliers and technology from the United States.