Sometimes one of the justices, because they're, you know, they're brilliant lawyers themselves, can put the question in a particular way so that, even if you've prepared to talk about the topic, the question is put in such an excruciatingly difficult way that there's just no good way to handle it.

There was a huge movement that led up to [gay marriage legilization], and I played a small role in the great scheme of things. But it was really a privilege to get to do it.

There was only really one time that I had a substantive interaction with the president [Barak Obama] directly, and that was in 2013 when we were deciding whether to file a brief in the first gay marriage case, the Perry against Hollingsworth case. That was a weighty decision about whether the United States government was going to come in and say that heightened scrutiny ought to apply and some state bans on same-sex marriage ought to be unconstitutional. And that was the one time in my tenure where I thought I ought not make this decision without talking to the president.

Quite often there's a great deal of disagreement within the executive branch about what we should do. Some cases are pretty straightforward, but a lot of them aren't.

The moot court process in our office when we get ready, we - everybody, including the SG, does two moot courts for each argument. And they are phenomenal, and they predict 90 percent of the questions that I get asked, at least 90 percent.

The cases involving the question of whether U.S. courts should be open to claims of international human rights violations brought by foreign persons against foreign government officials. And the State Department on the one side has got a very consistent and powerful view that U.S. courts should be open to those claims because there needs to be a place in the world where they can be brought. And those human rights norms ought to be real and enforceable, and we ought to be a beacon to the world.

The president [Barak Obama] had been asked some questions by George Stephanopoulos on a news show about whether it was a tax. And he had given an answer that you might read as him saying it wasn't a tax. I think what he said was, "It isn't a tax increase on all Americans."