But luckily the Constitution supplies a contingency plan, even if the administration doesn’t know it yet: If the administration loses in King, it can announce that it is complying with the Supreme Court’s judgment — but only with respect to the four plaintiffs who brought the suit.

This announcement would not defy a Supreme Court order, since the court has the formal power to order a remedy only for the four people actually before it. The administration would simply be refusing to extend the Supreme Court’s reasoning to the millions of people who, like the plaintiffs, may be eligible for tax credits but, unlike the plaintiffs, did not sue.

To be sure, the government almost always agrees to extend Supreme Court decisions to all similarly situated people. In most cases, it would be pointless to try to limit a decision to the parties to the lawsuit. Each new person who was denied the benefit of the ruling could bring his own lawsuit, and the courts would simply rule the same way. Trying to limit the decision to the parties to the suit would just delay the inevitable.

But the King litigation is different, because almost everybody who is eligible for the tax credits is more than happy to get them.