In some respects, the news that SCOTUS will hear the case about Obamacare isn't surprising at all. Several lower courts have ruled in various ways both for and against and both narrowly and broadly. There's a lot that needs resolved and the lower courts can't do that. Additionally, this has been a controversial issue that gets at the core of the US Constitution. I am a bit surprised though that the case will be heard this March before the 2012 elections.
The defenders of Obamacare could take two approaches: 1. The mandate is a tax and the Constitution in Article 1 gives Congress the right to levy taxes. Besides being having political fallout ("it's not a tax") it violates the Equal Protection clause for similar reasons that the poll tax was found unconstitutional ("We're not taxing blacks, we're just not taxing people who we happen to favor politically.") In other words, the tax isn't based upon what the people do, it's who they are. 2. "The Commerce Clause gives the power to Congress to regulate pretty much anything it wants." You reacted to the previous sentence with dread and horror, or with agreement. If you agreed with that statement, then imagine this: 10 years into the future, the political party you dislike the most has gained control of Congress and the Presidency. Now imagine that every terrible and despicable thing you could imagine you are either forced to buy or to do. Still a good idea? If it isn't 10 years from now, why is it a good idea now?
The other side of this issue is really two ideas: Wickard v. Filburn was decided wrongly and that the 9th and 10th Amendments are in the Constitution for precisely this purpose.
Either way, this decision is going to have a huge impact in the future of America. Either we now continue marching down the avenue of greater and greater government control over our lives without any way to turn back, or we preserve liberty and individual choice a bit longer.
I'll be waiting.

