I've expressed concern about the assaults on our institutions, both from external sources - meaning the Russians - and internal sources. And I think this will be a real test of the resilience of our system and its pillars.

The president sets the tone. He creates the atmosphere, and that can be enlightened, progressive, or it can be intimidating, depending on what the president's agenda is. I think the other dimension of this that I worry about is impacts overseas with friends and allies, many of whom are very, very concerned about America's position in the world and whether or not it's going to continue its leadership, which has been the prevalent condition since World War II.

Impeachment is our system's last resort for someone who treats himself or herself as above the law, the most relevant thing is whether this president, by his recent course of action, on top of his violations of the foreign corruption or emoluments clause, this president has shone that he cannot be trusted to remain within the law and our constitution's last resort for situations of that kind is to get the person out of office.

We're talking about nuclear war with North Korea. We're talking about Russia. Does it feel like the world has shifted? Are we all just in Donald Trump's reality show now?

Obviously, what's happening in China right now is crucial, in the party congress, which as someone said has anointed a new emperor of China in President Xi. So there's the rise of China, and their active involvement in the United States internally in our business and financial realms. That certainly bears watching.

We must remain mindful of the potential impact of over-correcting the authorizations of the intelligence community.

President Trump has the advantage of being surrounded by an excellent cadre of advisors. Kim Jong-un doesn't have any advisors that are going to give him objective counsel. He's surrounded by medal-bedecked sycophants, who dutifully follow him around like puppy dogs with their notebooks open, ascribing his every utterance, and pushing back against the great leader is not a way to get ahead.