I agree with the basic principle that anybody who wants to serve in our armed forces and make sacrifices on our behalf, on behalf of our national security, anybody should be able to serve. And they shouldn't have to lie about who they are in order to serve.

The two inaugurations were different. The first inauguration I was thinking to myself, "Let's make sure I don't screw this up." I think there is - people always talk about how cool I am. I don't care how cool you are.

[About his marijuana use] I did. It's not something that I'm proud of. It was a mistake as a young man, but you know? I mean not going to -- I never understood that line. The point was to inhale. That was the point.

When you see a Donald Trump and a Bernie Sanders, very unconventional candidates, have considerable success, then obviously there's something there that's being tapped into; a suspicion on globalization, a desire to reign in it's excesses, a suspicion of elites and governing institutions that people feel may not be responsive to their immediate needs. And that sometimes gets wrapped up in issues of ethnic identify or religious identity or cultural identity, and that can be a volatile mix.

When I turn over the keys to the president-elect, America will be much stronger than it was when I came into office.

To sustain a governing majority, that requires an ability for Republicans and Democrats to find some common ground. And right now, the structure of the system is such where it makes it really hard for people to work together.

I don't think there's anybody who's run a campaign like [Donald Trump] successfully in modern history, not that I can think of. And, as a consequence because he didn't have the supports of many of the establishment in his own party, because he ran sort of an improvisational campaign.