That is because the intent all along has been to drive this country toward a nationwide, single payer, federal government operated and controlled, health 'insurance' and health 'care' system. The supreme court has not and will not rule that requiring people to participate in a federal program is not unconstitutional. If they were to to that, then social security, medicaid, medicare, etc. would ALL go out the window.
The Obama administration NEEDS the current Obamacare mandate to be ruled unconstitutional in order to open the door for the to unveiling of the next Obamacare mandate - the one which requires everybody to purchase health insurance from the federal government - the one which WON'T be ruled unconstitutional by our dysfunctional supreme court...[tinfoilhatoff]
He'll need the Dems to control both houses of Congress to do that. I don't see the House of Reps going back to the Dems in November.