I think [Donald Trump] has to do everything he can to set up a firewall between him and his businesses. But I think it's unrealistic for people to be saying, oh, he should just sell all of his businesses.

We should be proud that so many want to come to America, that it is still seen as the land of opportunity. Let's make it a land of legal work, not black-market jobs. Let's make it a land of work, not welfare. Our land should be one of assimilation, not hiding in the shadows.

What I can say is, is that if you do a poll, and one of the worldwide polling companies did this, and they asked people in 50 countries, "Would you like to come to America," it's about 700 million would come next year. We would double our population.

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.

You don't go into politics unless you want to win.

I think it's a huge mistake. I think regime change in Syria, and this is what - I've been saying this for several years now. In 2013 when we first went in, I said, you are going to give arms to the allies of al Qaida, to radical jihadists? That's crazy.

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.