The U.S. Commodity Futures Trading Commission (CFTC) has filed a federal lawsuit against the state of Wisconsin, challenging its attempt to enforce state gambling laws against federally regulated prediction market platforms. The legal action, taken on April 28, 2026, directly responds to a civil suit initiated by Wisconsin Attorney General Josh Kaul on April 23, which targeted major platforms including Kalshi, Polymarket, Crypto.com, Robinhood, and Coinbase.
Wisconsin's original complaint alleged that 'event contracts'—financial instruments allowing users to wager on real-world outcomes like sporting events—constitute illegal sports betting under state law, characterizing the activity as a Class I felony. Conversely, the CFTC asserts that these instruments function as financial derivatives, specifically swaps, governed exclusively by the Commodity Exchange Act (CEA). The Commission argues that individual states lack the legal authority to unilaterally shutter federally registered derivatives exchanges.
CFTC Chairman Michael Selig stated that states 'cannot circumvent the clear directive of Congress,' adding that similar warnings have already been issued to New York, Arizona, and other states pursuing comparable enforcement. 'Our message to Wisconsin is the same as to New York, Arizona, and others: if you interfere with the operation of federal law in regulating financial markets, we will sue you,' Selig said.
Filed in a Wisconsin federal court alongside the U.S. Department of Justice’s Civil Division, the complaint argues that event-based contracts listed on designated contract markets fall under exclusive federal oversight. The CFTC wrote that Wisconsin’s effort to shut down these platforms 'intrudes on the exclusive federal scheme Congress designed to oversee national swaps markets.'
This move by the CFTC represents the fifth state it has sued this month alone, signaling a broad federal strategy to curb state-led enforcement actions. Legal pressure has been building across multiple states, with New York, Arizona, Connecticut, Illinois, and Nevada pursuing similar actions against prediction market firms. Earlier filings from New York Attorney General Letitia James described such contracts as unlicensed gambling products, while Wisconsin pointed to platform marketing language and fee structures as evidence of betting activity.
The CFTC’s latest complaint seeks a court ruling that state-level gambling laws do not apply to federally registered exchanges offering event contracts. It has also asked for a permanent injunction to prevent Wisconsin from taking further enforcement action against these platforms. Named defendants include Wisconsin Governor Tony Evers, Attorney General Josh Kaul, the state’s Division of Gaming, and its administrator John Dillett.
Federal courts have recently signaled potential support for the CFTC’s position, with some appellate rulings suggesting that state gambling laws cannot be enforced against platforms operating under federal registration. As the conflict intensifies, industry participants are watching closely to see if federal supremacy will ultimately shield these exchanges from state-level bans. Many analysts believe this escalating struggle is now on a trajectory toward the U.S. Supreme Court, where a definitive ruling will be required to resolve the boundary between state-level consumer protection powers and federal financial derivatives regulation.
