Most people are saying that obama will use a loss to attack the Supreme Court and ask for 4 more years so he could appoint new Justices.
Except for one thing. The health care bill was hugely, hugely unpopular. If obama says that if he gets four more years he'd pack the court, that may be a signal to a lot of people to vote against him.
He already looks like he's going to blame their lawyer for the loss. As much responsiblity as he's run from so far, this might be the last straw.
At the time the law was passed, most Americans were opposed to Obamacare but as Obama said once Americans understand what's in law and how it will effect them, they will support it. That's exactly what's happening. In a CNN poll release yesterday, opposition has dropped to 50%, down nearly 10 points from the time the law was passed. Only 30% wanted to see the law overturned.
http://i2.cdn.turner.com/cnn/2012/images/03/26/rel3b.pdf
I believe if the law is overturned, it will boast Obama's chance of reelection who is already strongly favored over Romney. For 30 million Americans looking forward to getting health insurance in 2014, the overturn of the law will not sit well at all. For Democrats who did not support the law because it wasn't a single payer plan, the overturn of the law will raise new hopes. Obama can use the healthcare issue to distract voters from the slow economic recovery.