The effectiveness of a group of people is not determined by their IQ but by how well they communicate.

Who could have predicted this, that the presidency is kind of a hard job? Nobody knew that. I also like the fact that Trump is a detail-oriented person. I find his interviews amazing. He's actually kind of remarkably candid.

Russia has a very sophisticated, advanced attack on U.S. businesses and U.S. government and U.S. institutions. And it's not like Donald Trump is going to be walking away from this. He will be spending a lot of time on it, if he's any sort of normal president.

Economists sometimes do try to reduce behavior to law-like predictability. But people respond differently to different primes, to different contexts even from one moment to the next. We possess multiple selves that are aroused by different circumstances.

Of those two [Hillary Clinton and Donald Trump], I do think that the - right now, at least in my mind, the Democratic theme is eclipsing the Republican one.

I would have swapped out Donald Trump's frontal cortex for somebody else's for a little more self-control.

Nonetheless, so whether it's unconstitutional or not [for judges to overruling presidents], I leave to others.