Predict how the Supremes will rule on Obamacare, no spin, predict the result
They really don't seem to like the Mandate, specifically, how it's worded as a penalty and not a tax. If it was called a tax, I don't think the cases would have made it this far. Still, the Court doesn't seem to like it, so I would guess they will strike that part down.
Problem is, without that, the whole law falls apart. So, if the Court strikes down just the Mandate, you will see A LOT of scrambling before the election. From both parties. If they strike down the whole thing, you will see the GOP celebrate in streets while millions lose their coverage over night. The GOP will then have to present what they want to "replace" the law with, and of course, they have nothing.
In the end, I don't see how Obama loses in any scenario.