I understand the tax code better than anybody that's ever run for president.

We owe $20 trillion, and we're a mess. And we've spent $6 trillion in the Middle East, according to a report that I just saw.And it's politicians like Secretary [Hillary] Clinton that have caused this problem.

First of all, you have to born with a brain. I mean, you can't be a dummy and say I'm going to become a multi-billionaire some day. But, more than anything else, you have to love what you do, and beyond that, you can't ever give up.

We have to hear how [Donald] Trump is the bad guy and Trump poses the problem. And it's just maddening, infuriating. I hear you. I'm totally on the same page with you.

You have to leave all your options open. And if you don't leave your options open, you're a fool.

Manage the downside; the upside will take care of itself

The fundamental problem with the immigration system in our country is that it serves the needs of wealthy donors, political activists and powerful, powerful politicians. It's all you can do.