Donald Trump is temperamentally unfit.

I don't think I underestimated [Vladimir Putin], but I think that I underestimated the degree to which, in this new information age, it is possible for misinformation for cyber hacking and so forth to have an impact on our open societies, our open systems, to insinuate themselves into our democratic practices in ways that I think are accelerating.

I do believe, separate and apart from any particular election or movement, that we are going to have to guard against a rise in a crude sort of nationalism or ethnic identity or tribalism that is built around an us and a them.

That we are in the midst of crisis is now well understood. Our nation is at war, against a far-reaching network of violence and hatred. Our economy is badly weakened, a consequence of greed and irresponsibility on the part of some, but also our collective failure to make hard choices and prepare the nation for a new age. Homes have been lost; jobs shed; businesses shuttered. Our health care is too costly; our schools fail too many; and each day brings further evidence that the ways we use energy strengthen our adversaries and threaten our planet.

We were still able to see the phone records of a potential terrorist cause, we held them, now you have to hope the phone company still has them, you have to argue with their chief counsel by the time you get access to it, and try to find out who they've been talking to before it's too late.

I think I will still feel that same appreciation for what [Winston] Churchill and others have said is the worst form of government except all the alternatives.

Some people only speak of freedom of speech while they're out of power. Once they're in power, they're ruthless in suppressing the rights of others.