Champions of ObamaCare want Americans to believe that the president's re-election ended the battle over the law. It did no such thing. The Patient Protection and Affordable Care Act won't be fully repealed while Barack Obama is in office, but the administration is heavily dependent on the states for its implementation.

At its core, ObamaCare is a massive entitlement expansion. Between vastly increased Medicaid eligibility and new premium subsidies, it is expected to bring 30 million more people onto the federal government's entitlement rolls. The law anticipates that the states will take on the burden of implementing the expansions, but states can opt out of both.

Running the exchanges would be an administrative nightmare for states, requiring a complicated set of rules, mandates, databases and interfaces to establish eligibility, funnel subsidies, and facilitate purchases. All of this would have to take place under broad and often incoherent statutory requirements and federal regulations that have yet to be written.