Say this for the lead opinion in the health care case the Supreme Court handed down Thursday: nobody saw that coming. Chief Justice Roberts joins with the court’s more liberal wing to uphold the Affordable Care Act ... as a tax? The result is, to put it mildly, counterintuitive. Scribes have been busily dissecting the chief justice’s doctrinal analysis from the instant the opinion went viral, but here’s a different thought: doctrine may not be the key to this judgment. As Leo Strauss once made a point of telling his students, a text can be read in many different ways, and will mean different things depending on the lens with which one reads it. The text the chief justice published on Thursday may or may not make good sense read as constitutional doctrine. But read it as constitutional politics and things get more interesting.