In its next Obamacare-related decision, the Supreme Court will decide whether employers in states that chose not to establish their own Obamacare exchanges can be forced to pay penalties for not offering insurance the government deems acceptable.

The case is somewhat complicated and based on textual questions and legislative history. But if the court rules that the phrase “established by the state” means what it looks like it means, this will bring a small dose of chaos to up to 37 states that now rely on the federal exchange — the infamous healthcare.gov.