One of the things that I am concerned about is the degree to which we've seen a lot of commentary lately where there were, there are Republicans or pundits or cable commentators who seemed to have more confidence in Vladimir Putin than fellow Americans because those fellow Americans were Democrats. That cannot be.

I do not talk to the FBI directors about pending investigations [on Hillary Clinton].

We want our children to live in an America...that isn't threatened by the destructive power of a warming planet.

If Mr. [Donald] Trump is up 10 or 15 points on Election Day and ends up losing, then, you know, maybe he can raise some questions. That doesn't seem to be the case at that moment.

There's a whole generation coming up behind us that was engaged, inspired, worked for change during the course of my presidency, saw what was possible.

We're up against the conventional thinking that says your ability to lead as president comes from longevity in Washington or proximity to the White House. But we know that real leadership is about candor and judgment and the ability to rally Americans from all walks of life around a common purpose, a higher purpose.

Basically, I am a night owl. My wife is an early bird, so she goes to bed around 9:30, and my kids are in bed about 8. So, if I am home, I will usually start writing about 9:30 and go till about 12:30 or 1:30, depending on what my energy level is.