Good. Obama's taking a minority stance on this issue, and this could be something Romney needs to fire up conservatives. Also, this takes away Obama's ability to attack Romney for being a flip-flopper without looking like a complete hypocrite.
See, this is what I mean. We have to make Obama look like the Democrats we defeated back in the early 2000s. Out of touch, liberal/radical, and use it to persuade swing voters who voted for George Bush and Barack Obama.
By this gay marriage backing, and dipping his toe into the Treyvon Martin "tragedy", and hopefully the Supreme Court striking down Obamacare this Summer, we can exploit Obama as the radical, something the McCain campaign was reluctant to do.
Because supporting marriage equality is a 'radical' thing to do.... okay yeah