Kalshi and Polymarket Launch Lawsuits Against US States Amid Federal Clash

Kalshi and Polymarket US have initiated legal proceedings against authorities in Missouri and Louisiana, marking a sharp escalation in the jurisdictional struggle surrounding event-contract trading in the United States. Concurrently, the Commodity Futures Trading Commission (CFTC) has brought court action against the state of Utah, underscoring broader friction between federal authorities and state-level regulators.

The disputes centre on the boundary between federally regulated derivatives trading and local gaming laws. Prediction markets allow market participants to trade binary contracts that settle based on the outcomes of real-world events, including political races and macroeconomic indicators. Operators structured under the Commodity Exchange Act have historically maintained that the CFTC holds exclusive regulatory oversight over designated contract markets, pre-empting state-level gambling legislation.

However, several US states have pushed back against the expansion of political and event wagering, arguing that such offerings fall under their constitutional authority to regulate betting within their borders. By challenging Missouri and Louisiana directly in court, the platforms are seeking judicial confirmation that state regulators cannot block or penalise federally registered event-contract operations.

The CFTC's separate litigation against Utah highlights that the federal watchdog is likewise prepared to defend its regulatory perimeter against state incursions. The coordinated wave of legal challenges is expected to provide much-needed clarity for the prediction-market sector, determining whether operators can run nationwide platforms under uniform federal rules or must instead navigate a fragmented, state-by-state enforcement landscape.