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.

I think what happened is that everybody's impressions got formed in those first few minutes. And I felt like, by the latter part of it, I kind of clawed my way back into the discussion. But everybody's impressions were set at the beginning. And wholly apart from me and whether I was good or bad, you know, there were a lot of hostile questions.

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.

I think what Lawrence did was provide an assurance that gay and lesbian couples could live openly in society as free people and start families and raise families and participate fully in their communities without fear. And two things flowed from that, I think. One is that has brought us to the point where we understand now in a way even that we did not fully understand in Lawrence, that gay and lesbian people and gay and lesbian couples are full and equal members of the community.

Very quickly the lawyers in the Justice Department pulled together a set of recommendations about how we ought to defend the law as a constitutional matter. And it was the lawyers in the Justice Department who thought that it was important to include the tax power argument as part of it.

I do think that the instant nature of the reaction now, I do think it has an effect, that people's instant reactions to things are valid and valuable. But they're not always right, and they're not always capturing the full reality.

Watch what happens on Twitter. One thing leads to another very quickly. And in an ironic sense, even though it's such a democratic form of communication, there's a funny way in which it leads to a hardening of a conventional wisdom much more quickly than might happen if you were reflecting on it a little more.