Canada sets aside 36 percent of their visas for people with skills they think their country needs. We set aside six percent. We educate the doctors, and then don't give 'em a green card.

The estate taxes, on balance, are good. They get people to give money to charity, and they prevent these family dynasties which keep other people from having opportunities. It may be good for a family, but for society it's probably not good. And I've always been in favor of having an estate tax.

[Jeb Bush] could, as I describe it, run the railroad.[John] Kasich could run the railroad. Hillary Clinton can run the railroad. Running the railroad is the most important thing. You have got 4 million employees; you've got to make the system work, and it doesn't work very well.

I like the theater, dining and chasing women. Let me put it this way: I am a single, straight billionaire in Manhattan. It's like a wet dream.

Donald Trump says he wants to run America like he's running his business? God help us.

Design does matter. And not necessarily in a way that people realize. A lot of what you do, people take for granted - that a park has always been here, that a bicycle lane has always been there, that the street is safe or clean.

We would betray our values and play into our enemies' hands if we were to treat Muslims differently than anyone else. In fact, to cave to popular sentiment would be to hand a victory to the terrorists, and we should not stand for that.