We've sued out-of-state power plants that are polluting our air and led a coalition of attorneys general from Connecticut, Delaware, Maryland, and Massachusetts against efforts in the U.S. House of Representatives to remove critical environmental regulations that protect New York communities from toxic pollution.

These facts are clear: Trump University was an unlicensed enterprise promising students that they would become wealthy by learning Trump's real estate tips and strategies, taught by his handpicked instructors.

I have three very simple principles. I don't like conflicts of interest; they should be eliminated or disclosed. I believe in transparency, that people have to really not just know but understand what they're buying and selling. And that you have to have enough capital to back up your promises.

I don't like conflicts of interest; they should be eliminated or disclosed. I believe in transparency: that people have to really not just know but understand what they're buying and selling.

I almost didn't turn pro at all. I was tempted to be a career amateur. I worked as an investment banker for nine months after I got out of school, and the money was fantastic and promised to get even more lucrative.

If the career you have chosen has some unexpected inconvenience, console yourself by reflecting that no career is without them.

Why can't it be awesome to work for a food company? Why can't we create an environment where people are trying to push each other to do great things, and we're not trying to steal from anybody - we're trying to be good to our farmers and run an honorable business, if there is such a thing anymore?

At the Harvard Business School, I really felt I had gained the ability to resolve difficult issues. But I also felt that I wasn't in the mainstream with my fellow students. During job-hunting season, for example, everybody shaved their beards for interviews. I thought, 'This is crazy.' So I grew a beard.