We have lots of challenges around the world, and I have no doubt the intelligence community will continue to watch them, monitor them, and report on them. The issue is, with all of our other distractions here in Washington, particularly, will the appropriate attention be paid to each one of these issues?

If we - particularly, if we peremptorily attack North Korea - that without deliberation, that North Korea will reflexively unleash all the rocketry and artillery - which they're pretty good at, by the way - on Seoul, and do as they vowed many times, to convert Seoul into a sea of fire. So, if we do something like this, this will have cataclysmic results.

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.

When I visited North Korea in November 2014, is that Kim Jong-un is not merely the head of state of the DPRK - the Democratic People's Republic of Korea, North Korea - he's also their deity. So, when you insult him as the head of state, you're also insulting the deity, which of course the regime plays to a fare-thee-well to the domestic audience there.

We had a general awareness, for example, of Russian use of social media - Facebook ads, use of Twitter, fake news implants - we had a general understanding of that. But now, as time has elapsed and time has gone on, I've certainly learned a lot more about the depth and breadth of what the Russians were about.

What I said was, ‘the NSA does not voyeuristically pore through U.S. citizens’ e-mails.’ I stand by that.

I think Trump's presidency represents a completely different model than what we're used to. And I think to your point, yes, he is a great communicator, you know? He uses Twitter to great effect. I just wish he could stick more to the truth, because it's a very effective way of communicating directly with the American people.