Federal Judge Halts Arizona Case Against Kalshi

Prediction platform Kalshi has won a notable legal victory in Arizona, blocking state officials from pursuing criminal charges against the company. US District Judge Michael Liburdi issued a ruling that prevents Attorney General Kris Mayes from prosecuting the New York-based firm under Arizona’s gambling laws. The decision reinforces Kalshi’s arguments that it only answers to the CFTC.

Kalshi Argues That It Answers Only to the CFTC

Liburdi concluded that oversight of platforms like Kalshi falls squarely within the Commodity Futures Trading Commission’s authority, leaving the state with little room to maneuver. He concluded that Congress has repeatedly chosen to expand federal control in this space, signaling a clear preference for a single regulatory framework over a patchwork of state-by-state rules. 

Because Arizona’s gambling laws stand as an obstacle to federal regulation, those laws are preempted.

US District Judge Michael Liburdi

Arizona had taken an aggressive stance. In March, Mayes announced a 20-count misdemeanor indictment against Kalshi, accusing the company of running an unlawful wagering operation and offering contracts tied to election outcomes. The state argued that such activities constituted illegal gambling and were subject to severe punishments under state law.

Kalshi, meanwhile, has always maintained that its products do not function as traditional bets. The company presents its offerings as “event contracts,” financial instruments that allow users to trade on the likelihood of real-world outcomes. The company has relied on this distinction as its primary legal defense, citing a prior appellate ruling that cleared the way for election-related contracts under federal law.

The Dispute Could Reach the US Supreme Court

The Arizona case tested Kalshi’s claims. State officials contended that Kalshi must comply with local laws even if it operates under federal oversight. They argued that the company should not be shielded from local criminal statutes. Liburdi disagreed, warning that allowing states to impose their own rules would lead to severe difficulties for companies trying to operate nationwide.

The ruling converts an earlier temporary restraining order into a more permanent block on enforcement. However, the Attorney General’s office may still appeal. Legal experts predict that the fight will continue as other states have also issued similar challenges. Many believe the issue is ultimately headed for the US Supreme Court, though a final resolution could still be years away.

This case marks another chapter in the broader conflict around prediction markets. Platforms like Polymarket and Kalshi draw millions of users wagering on everything from elections to economic trends. Supporters say these markets offer valuable forecasting tools, while critics see them as nothing more than gambling under the guise of a financial instrument.