I think it's very important to remember that so much of the work that gets done between countries is not done at the level of presidents, but is done within various agencies, whether it's law enforcement or economic ministries. And when they establish relationships and systems of communications and shared projects and shared visions, those structures continue even after any particular president is gone. It builds trust and understanding between countries that are critically important.

If we got there and we looked up and we said, "You know what? Black folks are still doing a little bit worse off than whites, but it's not like it was 20 years ago," then we can have a discussion about how do we get that last little bit. But that's a high-class problem to have.

Donald Trump is like Hillary Clinton said, a man you can bait with a tweet is not a man you can trust with nuclear weapons. You can`t do it.

Presidential elections always turn on personalities, they turn on how campaigns are run, they turn on natural desires for change.

The key is whether or not we have got priorities that are working for you, as opposed to those who have been dictating the policy in Washington lately. And that's mostly lobbyists and special interests. We have got to put an end to that.

Poorly secured nuclear material in the former Soviet Union, or secrets from a scientist in Pakistan could help build a bomb that detonates in Paris. The poppies in Afghanistan become the heroin in Berlin. The poverty and violence in Somalia breeds the terror of tomorrow.

We've got to control our own energy. Now, not only oil and natural gas, which we've been investing in; but also, we've got to make sure we're building the energy source of the future, not just thinking about next year, but ten years from now, 20 years from now. That's why we've invested in solar and wind and biofuels, energy efficient cars.