I hate that Mosul is falling, but I also think that for 10 years we have supplied the Iraqis and they can't stand up and do anything to defend their country, and it is all up to us?

I think it's a real debate how big NATO should be and whether or not it's more provocative than good. Whenever there's a war fought, our soldiers fight it and our dollars pay for it. And, really, our decisions need to be about our national security.

I don't know about [Rex] Tillerson, but I do know that John Bolton doesn't get it. He still believes in regime change. He's still a big cheerleader for the Iraq war. He's promoted a nuclear attack by Israel on Iran. He wants to do regime change in Iran. So, I think John Bolton is so far out of it and has such a naive understanding of the world. If he were to be the assistant or the undersecretary for Tillerson, I'm an out automatic no on Bolton.

In 1997, I, along with 200 other young ophthalmologists formed the National Board of Ophthalmology to protest the American Board of Ophthalmology's decision to grandfather in the older ophthalmologists and not require them to recertify.

A free society will abide unofficial, private discrimination, even when that means allowing hate-filled groups to exclude people based on the color of their skin.

I think my dad has helped me tremendously.

I think that there is a bipartisan consensus that's incorrect that we should have the whole world be in NATO. For example, if we had Ukraine and Georgia in NATO - and this is something McCain and the other neocons have advocated for - we would be at war now because Russia has invaded both of them.