After Clement argues, Solicitor General Donald Verrilli is up next. From Lawrence Hurley before he went into the courtroom:

Verrilli, the Obama administration’s top lawyer, has his 15 minutes on the merits. He also argued Tuesday in the Proposition 8 case, urging the court to strike the law down.

The Obama administration’s position is that any laws that specifically target gays and lesbians deserve “heightened scrutiny” when courts examine them and that DOMA does not pass that test.