Take your pick, they’re all good:

George Will

Jonathan Adler

Elizabeth Price Foley

Josh Blackman

Yuval Levin

Ilya Shapiro

Roger Pilon

Michael Cannon

Oren Kerr

But if you only have time for one, read Justice Scalia’s blistering dissent:

Perhaps the Patient Protection and Affordable Care Act will attain the enduring status of the Social Security Act or the Taft-Hartley Act; perhaps not. But this Court’s two decisions on the Act will surely be remembered through the years. The somersaults of statutory interpretation they have performed (“penalty” means tax, “further [Medicaid] payments to the State” means only incremental Medicaid payments to the State, “established by the State” means not established by the State) will be cited by litigants endlessly, to the confusion of honest jurisprudence. And the cases will publish forever the discouraging truth that the Supreme Court of the United States favors some laws over others, and is prepared to do whatever it takes to uphold and assist its favorites.