Okay, I made that up — but you know it's true.
As for Our President's "endorsement," whether or not it was predicated by Joe Biden's alleged "gaffe," it really doesn't matter. The social/religious conservatives who actually care about the issue — the white ones, that is — weren't going to vote for him in the first place. The black ones will vote for him anyway — he's still black, kinda. Well, he's as black as he ever was.
The basic idea we ought to recognize here is that, since most Americans are straight and have straight offspring, not many give a damn about same-sex marriage one way or the other. Oh, yes, they have opinions, but those opinions will not influence their votes. However it works out, it will not make a damned bit of difference in their lives (except for the divorce lawyers.)
Since the Wall Street money seems to have taken a major turn towards Romney, Obama has no reason to desist from the populist rhetoric that can help him win in November. I know that recent polls indicate that Americans say they don't resent the super-rich — and really would like to be super-rich themselves (surprise!) — but, you know, generating resentment is easy. The Republicans have been doing it for years — against "welfare queens," immigrants (legal and/or illegal), alleged "socialists," and anybody else who might not be white, Christian, or totally ignorant.
Obama might lose in November — but it won't be because he (halfheartedly) endorsed same-sex marriage. It will be because the real faggots are running his campaign, and he's too limp-wristed to do what he needs to do to win.