Donald Trump is a great listener, and he's a good challenger. He doesn't come across as a person who thinks he knows it all. In fact, he once told me he has had lot of things to learn.

When you look back, history is not going to be kind to these last 16 years from 2000 to 2016.

NATO was formed post-World War II. We're a little bit more than a half-century old. Do we want NATO to go on for another half-century? I think that the answer is, sitting here today: I don't know. If I had to bet on it, I would say, yeah, we have to have these alliances going forward and see who's going to pay for them.

I think all of Europe has been too soft on the refugee crisis.

Trump respects people who are selfish about their country. Putin is a guy who is very selfish about Russia and about the Russian federation, and he understands the history of his country. You can't say, "I don't like you." You've got to respect him. He's a world leader.

Russia ought to get Iran to back out of the proxy wars they are involved in.

Why are all these refugees rushing to the beauty and strength of Europe and to the United States and not rushing to their own capitals or the capitals of the Muslim world? We ought to be pushing back. We ought to be putting people back on these boats and putting them back into the places where they came from and telling these leaders in the Arab world, "You have a responsibility as well."