The criminal-justice system is, obviously, the sole source of racial tension in this country [USA] or the key institution to resolving the opportunity gap. It is a part of the broader set of challenges that we face in creating a more perfect union.

I would love to see an America where race is understood in the same way that the ethnic diversity of the white population is understood.

Nobody really thinks that Bush or McCain have a real answer for the challenges we face, so what they're going to try to do is make you scared of me. You know, he's not patriotic enough. He's got a funny name. You know, he doesn't look like all those other presidents on those dollar bills, you know. He's risky.

It's also wonderful to be back with my great friend and ally, Chancellor [Angela] Merkel. As I reflect back over the last eight years, I could not ask for a steadier or more reliable partner on the world stage, often through some very challenging times.

Donald Trump is temperamentally unfit.

One of my strengths is I have a pretty even temperament. I don't get too high when it's high and I don't get too low when it's low. And what I found during the course of the presidency, and I suppose this is true in life, is that investments and work that you make back here sometimes take a little longer than the 24-hour news cycle to bear fruit.

We are on alert 24/7. And everything that you report will be investigated. We do it in private. We do it covertly. This could be a problem, it could simply be your neighbor having a bad day. But better be safe than sorry.