David Link has a must-read. Money quote:
I think the administration is trying to get the first rulings on DOMA focused on (a) Section 3 and (b) how it applies to states that have already adopted full marriage rights. Section 3 just applies to the federal government, and says it can only recognize opposite sex marriages. Courts generally shouldn’t reach out for issues and particularly constitutional issues that go further than are required to actually decide the particular case before them. So a court, and particularly the Supreme Court, could heed the government’s lead, and decide only those two issues Is Section 3 constitutional with respect to the federal government as it applies to a couple who are legally married under a state’s law?