Robinhood sues Missouri over sports event contract ban

Sometime in mid-September, Missouri Attorney General Catherine Hanaway's office sent a cease-and-desist letter to Robinhood instructing the company to stop offering sports event contracts to Missouri residents. The letter said those contracts were unlicensed gambling products subject to state gaming law. Robinhood's response, filed in the Eastern District of Missouri, is that the entire premise of that letter is legally incoherent.

The argument Robinhood makes is not new. Sports event contracts are derivatives. Derivatives are regulated under the Commodity Exchange Act. The CFTC has exclusive jurisdiction over designated contract markets and the products listed on them. State gaming commissions, therefore, have nothing to regulate. This is the same structural argument Kalshi has used in New Jersey, where it secured both a temporary restraining order and a preliminary injunction. Robinhood is now running the same play in a different court.

Polymarket filed its own suit against Missouri on a different theory — the Commerce Clause rather than CFTC preemption — which the newsroom has already reported. What is worth examining separately is what Robinhood's choice of argument tells you about how this litigation is consolidating.

The preemption argument is cleaner than the Commerce Clause argument because it has an institutional anchor. When you tell a court that Congress vested the CFTC with exclusive jurisdiction and that this forecloses state enforcement, you are asking the court to do something it has done before in analogous contexts. The CFTC's mandate over derivatives markets has been tested in federal courts. The legal infrastructure for the argument exists. Robinhood's filings make the case explicitly: compliance with Missouri's licensing requirements would require Robinhood to seek state gaming authorization, which would put it in direct conflict with the conditions of its federal registration. You cannot hold a state gambling license and maintain the structural integrity of a federally registered derivatives exchange at the same time. That is the bind Hanaway's letter creates, and it is a real bind.

What I do not think the consensus has priced correctly is the cumulative weight of these cases. Missouri now faces separate federal suits with separate legal theories from at least two platforms, while Kalshi operates under injunctive relief in multiple jurisdictions. Each successful TRO narrows the space in which state regulators can operate without triggering immediate federal court review. The states are not losing slowly — they are building a jurisprudential record that makes each successive enforcement action harder to sustain.

Missouri's position depends on a court eventually holding that state gambling law survives the CFTC's preemption framework. That is a live legal question, and I would not declare it settled. But the procedural momentum is not running Missouri's direction. Courts granting preliminary injunctions are making a threshold judgment that the plaintiffs are likely to prevail on the merits. That judgment has now been made in New Jersey. If a court in the Eastern District of Missouri reaches the same threshold conclusion, the AG's enforcement posture becomes increasingly difficult to maintain without a circuit-level ruling that explicitly says the CFTC framework does not preempt state gaming law.