[Donald Trump administration] didn`t ask me to stay and 40 years seemed like enough.

We are a new nation conceived in liberty, and dedicated to the proposition that all men are created equal. That's what makes us Americans. When we sign onto that belief, we sign onto the core American identity, and that's very deep in us.

Republicans - Reagan but also George W. Bush - believed in freedom, and they believed in America's role. To have the governing party speak in terms of a zero-sum world, or speak in terms of America's purpose as no more than grabbing the largest share possible in the short run, goes against our foreign policy tradition that goes back to 1900, really.

What [Russians] want to do is undermine the Western liberal order.

Realism is important in foreign policy. You have to be realistic about what you can achieve, and about the pitfalls, and problems along the way, of which there are plenty. Nothing is easy. It's always rough.

The West in its modern form since 1945 is a miracle, and that`s in our American interests. It`s its good that the West is strong and at peace, and we should want more of that, not less.

The same people the Americans sent over - that we sent over to advise the Russians, we also sent over to advise the Poles about how to build a post-communist economy. Same people, same advice, with radically different results, which leads to suspicion it's not our advice which was the crucial variable. It was the Poles, on one hand, and the Russians on the other. The Poles succeeded; the Russians didn't. Don't blame us.