Missouri Gaming Commission sues over sports betting swap classification

Missouri Gaming Commission lawsuit tests the boundary between swaps and sports bets

Catherine Hanaway's cease-and-desist letter set an October 16 deadline. Kalshi did not comply. The lawsuit it filed in response is, at its structural core, the same argument Kalshi has made in Utah, in Louisiana, and in every other state that has moved against it — but Missouri's counterargument is sharper than most, and the sharpness matters.

Missouri's position is not simply that Kalshi needs a state licence. It is that Kalshi's event contracts do not qualify as "swaps" under the Commodity Exchange Act in the first place. That is a different attack. The preemption argument Kalshi depends on — that the CEA grants the CFTC exclusive jurisdiction over swaps traded on designated contract markets — only holds if the underlying instruments are in fact swaps. Hanaway's office is arguing they are not. They are bets, and the CEA does not preempt state gambling law over bets.

I have watched this jurisdictional line get litigated in other contexts, and the definitional question is genuinely difficult. The CEA's swap definition is broad, but it has limits, and those limits have never been tested against a product that looks, from the consumer's chair, like a parlay. The CFTC's own approval of Kalshi's election contracts in 2023 gives Kalshi a strong procedural argument — the agency reviewed the product and permitted it — but agency approval is not the same as a judicial determination that the product meets the statutory definition. Those are separate questions that federal courts have not resolved cleanly.

What Missouri has done, whether by design or by the accident of Hanaway's instinct, is locate the weakest link in Kalshi's chain. The Supremacy Clause argument is powerful when federal jurisdiction is clear. When the predicate — what kind of instrument this is — remains unsettled, the preemption claim has to do more work than it can currently do on its own.

Kalshi's billion-dollar raise and its $40 billion valuation give it the resources to litigate this simultaneously across ten states. But resources do not resolve the definitional problem. If any federal court in any of these cases concludes that event contracts on sporting outcomes are not swaps within the meaning of 7 U.S.C. § 1a(47), the entire preemption architecture collapses — not in one state, but in all of them at once.

The legal standard that governs the outcome here is not the Supremacy Clause. It is the threshold question the Supremacy Clause depends on: whether a Kalshi sports event contract meets the CEA's statutory definition of a swap. That is the question Missouri has put on the table, and it is the one no court has yet answered.