The Obama administration has decided to stop defending Section 3 of the Defense of Marriage Act, which defines marriage for federal purposes as 
only between a man and a woman. This is from the Dept. of Justice statement:
After careful consideration, including a review of my recommendation, the President has concluded that […] classifications based on sexual orientation should be subject to a more heightened standard of scrutiny. The President has also concluded that Section 3 of DOMA, as applied to legally married same-sex couples, fails to meet that standard and is therefore unconstitutional. Given that conclusion, the President has instructed the Department not to defend the statute in such cases. I fully concur with the President’s determination.
Consequently, the Department will not defend the constitutionality of Section 3 of DOMA as applied to same-sex married couples in the two cases filed in the Second Circuit.
This, by the way, is a good example why I’ve never joined in the general condemnation of conservatives for “reigniting the culture wars” whenever they introduce an abortion bill or somesuch. I’m on the opposite side of these conservative efforts, of course, but the fact is that liberals started the culture wars in the 60s and it’s something we should be proud of. So while I oppose the conservative side of the culture wars, I approve of the culture wars in general, and I applaud Obama and Holder for reigniting it last year when Congress repealed Don’t Ask Don’t Tell and for reigniting it in the case of DOMA today. Blacks, Hispanics, gays, women, the disabled and millions of others have benefited tremendously from the culture wars, and I’m happy to see it continue until there’s no more war to fight.
