Federal Court Halts Arizona's Criminal Prosecution of Prediction Market Kalshi

District Judge Michael Liburdi has blocked the state of Arizona from proceeding with an arraignment scheduled for April 13 against prediction market provider Kalshi. The decision comes as a temporary victory for the platform, which had been facing 20 criminal charges filed by the state for allegedly violating local gambling laws. The intervention was prompted by the Commodity Futures Trading Commission (CFTC), which contends that prediction markets—also known as event contracts—are classified as swaps. Under this classification, the CFTC argues that federal supervision takes precedence over state-level enforcement, effectively shielding compliant companies from state criminal prosecution. CFTC Chair Michael Selig praised the ruling, stating that the use of state criminal law against companies complying with federal regulations sets a dangerous precedent. The judge's order specifically restrains Arizona from enforcing gambling laws against contracts listed on CFTC-regulated designated contract markets. The legal landscape for prediction markets remains fragmented. While the Third Circuit Court of Appeals recently ruled that these markets are subject to CFTC rules, a Nevada state court previously allowed the Gaming Control Board to block Kalshi. The Ninth Circuit is expected to hold a consolidated hearing next week to further clarify the regulatory boundaries between state and federal jurisdiction.