Missouri links sports betting rules to voter approval

CFTC preemption test sharpens as Missouri ties sports contracts to voter mandate

Missouri Attorney General Catherine Hanaway sent cease-and-desist letters to six prediction market operators on the same day the state's licensed sports wagering market was collecting its first full season of regulated revenue. That timing is not incidental. Amendment 2 passed in 2024, the licensed market opened December 1, 2025, and the regulatory infrastructure it created — licensing fees up to $500,000, a 10% gross receipts tax, a 21-and-older floor — now has a political constituency. Hanaway is not acting in a vacuum. She is acting in a market that voters built and that operators are profiting around.

The legal argument her office is making is the one that has been gaining traction in state capitals for most of this year: that the Commodity Exchange Act does not preempt state gambling law in this area, and that sports event contracts do not qualify as swaps governed exclusively by federal jurisdiction. This is a contested reading. The platforms named — Kalshi, Polymarket, Robinhood, Underdog, Crypto.com, and Novig — have each, in their own way, staked their operating model on the opposite view. Federal designation as a derivatives exchange, the argument goes, creates a regulatory lane that states cannot close.

The CFTC preemption question has never been resolved cleanly on these facts. What Hanaway's office is doing, whether intentionally or not, is forcing it closer to resolution. Each cease-and-desist letter that produces a court response adds to the record. Each injunction granted or denied narrows the doctrine. Courts do not write the law here — but they will eventually have to say what the law means, and the states are generating the cases.

The age-restriction allegation against five of the six operators is the sharper problem in the near term. Preemption is a legal theory that takes years to exhaust. A finding that a platform permitted minors to place wagers on sports outcomes is a regulatory fact that cannot be argued away by pointing to a CFTC designation. Novig was carved out of this allegation specifically — the cease-and-desist to that company does not include the age-access claim. That distinction will matter if these letters produce enforcement actions rather than settlements.

The standard that governs here is whether sports event contracts, as structured and offered by these platforms in Missouri, constitute sports wagering within the meaning of Missouri's post-Amendment 2 regulatory framework — and whether that framework is preempted by the Commodity Exchange Act as amended by Dodd-Frank. The CFTC's jurisdiction under 7 U.S.C. § 7a-3 covers designated contract markets and their listed contracts. What that jurisdiction does not clearly do, and what no circuit court has squarely held, is strip state regulators of authority over products that look, to a Missouri voter, exactly like the sports bets they approved a licensing regime to govern.