
According to the federal complaints, the CFTC and DOJ sued Illinois, Connecticut, and Arizona over state efforts to regulate prediction markets, arguing federal law gives the CFTC exclusive authority over event contracts.
The CFTC and the U.S. Department of Justice have filed lawsuits against Illinois, Connecticut, and Arizona over who has authority to regulate prediction markets. According to the federal complaints, the government argues that the Commodity Exchange Act gives the CFTC exclusive oversight of event contracts offered on federally regulated platforms, and seeks to block state interference. A complaint against Illinois names Governor JB Pritzker, adding detail to the broader dispute over whether states can act against prediction market operators such as Kalshi and Polymarket.