Defending Obamacare

There's been a lot of speculation recently about why the Obama administration has decided to forgo en banc review in the 11th Circuit. I think it only necessary to look at the actions of this administration to determine the reason. Specifically, the decision to no longer defend DOMA and DADT. The President is smart enough to realize that his chances of re-election aren't looking too good right now (although he may yet be re-elected) and he wants the weight of the government on the side of this law. He knows full well that a Republican president may, and probably will, refuse to defend the law. Given that his administration's has set the precedent of refusing to defend laws with which they don't agree he would have no grounds to complain. He also knows that Obamacare probably can't be revoked by a Republican Congress, absent a fulibuster-proof Senate, which isn't likely to happen.