Given the clear case for the law’s constitutionality, it’s distressing that many assume its fate will be decided by a partisan, closely divided Supreme Court. Justice Antonin Scalia, whom some count as a certain vote against the law, upheld in 2005 Congress’s power to punish those growing marijuana for their own medical use; a ban on homegrown marijuana, he reasoned, might be deemed “necessary and proper” to effectively enforce broader federal regulation of nationwide drug markets. To imagine Justice Scalia would abandon that fundamental understanding of the Constitution’s necessary and proper clause because he was appointed by a Republican president is to insult both his intellect and his integrity…

Only a crude prediction that justices will vote based on politics rather than principle would lead anybody to imagine that Chief Justice John Roberts or Justice Samuel Alito would agree with the judges in Florida and Virginia who have ruled against the health care law. Those judges made the confused assertion that what is at stake here is a matter of personal liberty — the right not to purchase what one wishes not to purchase — rather than the reach of national legislative power in a world where no man is an island.

It would be asking a lot to expect conservative jurists to smuggle into the commerce clause an unenumerated federal “right” to opt out of the social contract. If Justice Clarence Thomas can be counted a nearly sure vote against the health care law, the only reason is that he alone has publicly and repeatedly stressed his principled disagreement with the whole line of post-1937 cases that interpret Congress’s commerce power broadly.