The second constitutional infirmity relates not to Congress, but the states. Unlike prior exercises of presidential enforcement discretion, the fix depends on states violating federal law. That is because it does not change the law on the books. Rather, the feds are simply signaling that they will not enforce certain provisions for some time.

But many parts of Obamacare do have to be applied by states, the traditional front lines of insurance regulation. States, however, lack “enforcement discretion” when it comes to ignoring federal law, even when the president thinks it would be a good idea. As the president has often reminded us, the ACA is “the law of the land,” and remains so after the fix.

The Constitution’s Supremacy Clause makes federal law—not presidential policies— binding on the states. So what’s a state insurance commissioner to do? Federal law requires health plans to have a mandatory level of “minimum coverage.” Thus it is not clear how a state insurance commissioner can authorize a plan that violates federal law. Such action would create a direct conflict between state action and federal law—and the latter automatically wins (even without the broad view of preemption of state laws that the administration has championed in immigration cases).

And the fix might violate state laws as well.