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 had a great deal of independence from the president and the White House during the entirety of my five years. And I'm not sure exactly what that is, but our friend, Walter Dellinger, has a theory about it, and I think he's probably right. And the theory starts with the fact that I worked in the White House for a year and a half before coming over to the position of SG. And because of that, when I was nominated, there was some chatter out there that, "Oh. They're putting a political hack in. This has never happened before."

I did think Justice [Antony] Kennedy's opinion on Lawrence was critical to that because it really, what Lawrence in one sense was, of course, about consensual sex being something that the government can't regulate. But really in a more fundamental sense, what it was saying, "Look. Gay people are normal people, and they get to live normal lives. They're not criminals by virtue of the fact of being gay."

The fact that you have a policy of such consequence directly affecting millions of people and you have a legal question of great consequence about the scope of the president's authority to act in implementing the immigration laws in this way and you have a one-line decision from the court affirming by an equally-divided court, it's an inevitable consequence of where we are.

I do think it's true that a huge amount of the oversight that the White House engages in with respect to the Executive Branch is out of fear that somebody's going to do something crazy and drive the president off a cliff.

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.

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.