The need for peace in Northern Ireland goes well beyond political stability. It now speaks to regional Europe and even global stability.

I also learned that a person was not necessarily bad just because you did not agree with him, and that if you believed in something, you had better be prepared to defend it.

I think wherever we can cooperate with Russia, that's fine. And I did as secretary of state. That's how we got a treaty reducing nuclear weapons. It's how we got the sanctions on Iran that put a lid on the Iranian nuclear program without firing a single shot.

Remember, Donald [Trump] started his career back in 1973 being sued by the Justice Department for racial discrimination because he would not rent apartments in one of his developments to African-Americans, and he made sure that the people who worked for him understood that was the policy. He actually was sued twice by the Justice Department.

I've been really at the highest levels of American political life.

I have a lot of stamina and I have a lot of resilience.

I'm in charge of the State Department's 60,000-plus people all over the world, 275 posts.