Federal appeals court revives Arizona effort to prosecute Kalshi
A federal appeals court revived Arizona's effort to prosecute Kalshi under state gambling laws. The ruling allows the state attorney general to pursue the case against the CFTC-registered prediction market platform. A separate federal judge simultaneously blocked Phoenix from enforcing local gambling ordinances against Kalshi, creating conflicting federal court outcomes in Arizona. The platform faces expanding state-level legal exposure across the Ninth Circuit's western jurisdiction.
Kalshi's federal preemption shield is crumbling circuit by circuit. The Arizona revival means state prosecutors now hold appellate cover to treat CFTC-registered platforms as gambling operators in a third distinct state forum. Kalshi must absorb local licensing requirements it built its federal designation to bypass, or retreat behind costly geofences.
Connecticut and Kentucky have already filed parallel suits, and the reasoning reaches any platform offering sports-linked contracts, so Polymarket and Novig face identical exposure. Traders hold positions whose validity now depends on geography, not federal registration. Each new state filing shrinks the safe territory where CFTC designation alone protects contract enforceability. The first platform to lose a second circuit case risks a domino that fragments the national sports market before any Supreme Court review.
This is the third Ninth Circuit defeat for Kalshi in under three days, after parallel losses on Nevada geofencing and preemption stripping, cementing the circuit's position that CFTC-registered sports contracts remain subject to state gambling law.