The area of climate change has a dramatic impact on national security.

I think my best advice would be to separate Donald Trump, the president of the United States from whatever investigation is being conducted by the FBI. I mean, there is something to be said, frankly, about the need for the appointment of an independent prosecutor because the American people are entitled to have a full review of what happened as a result of what the Russians did during our election.

I mean, the Taliban, my view is that they have been weakened.

If the Iraqis fail to implement the reforms, if they fail to get a handle on the violence, there's nothing the United States can do, militarily or otherwise, that can solve those problems. They have to assume the primary responsibility to govern themselves.

Clearly, Russia has lied to the world about what's going on in Ukraine. They have clearly violated the cease-fire agreements.

The political and substantive reality is that the agenda has to change. I don't think they have any choice.

Russians understand strength, and if they feel that their opponents are weak, they will take advantage of it.