Bill Clinton, who signed the Defense of Marriage Act into law in 1996, has an op-ed piece in the Washington Post calling on the Supreme Court to strike down the law, which defines marriage under federal law as being between a man and a woman, as unconstitutional.
It's interesting that President Clinton is taking this approach rather than asking Congress, particularly the Senate, which has a Democratic majority, to repeal the law. President Obama has been known to fly around the country making speeches urging Congress to act on an issue when he feels strongly enough about it or when he thinks the politics of it favor his side. Yet on this one he, too, seems to be hoping the Court rather than the Congress takes the lead.
This is one of those issues like the value of the dollar, where the politicians seem to prefer that the responsibility rests with someone else (the Federal Reserve, the Supreme Court) who doesn't have to run for re-election. It's an error, in my view, because under our system the responsibility for making sure the laws comport with the Constitution rests not only with the Article III judges but with all of the officials who swear an oath to protect it.