CFTC Sues Minnesota Over First State Ban on Prediction Markets
The CFTC sued Minnesota on Tuesday, one day after Governor Tim Walz signed the first state law in the US fully banning prediction markets. The case may end at the Supreme Court.
Quick Insights
- The CFTC sued Minnesota on Tuesday, one day after Governor Tim Walz signed the first US state law fully banning prediction markets including Kalshi and Polymarket.
- The law (SF4760) takes effect 1 August and criminalises operating, hosting or promoting prediction markets, with potential felony exposure for violators including banks, payment processors and media partners.
- The CFTC argues Minnesota's ban is unconstitutional because event contracts fall under exclusive federal derivatives jurisdiction, not state gambling law.
- The case is the fifth state lawsuit the CFTC has filed in 2026 over prediction market enforcement and is widely expected to be the one that reaches the Supreme Court.
The Commodity Futures Trading Commission sued the state of Minnesota on Tuesday, one day after Governor Tim Walz signed legislation making it a crime to operate, host or promote a prediction market within state borders. The lawsuit, filed jointly with the US Department of Justice, marks the most direct confrontation yet between federal regulators and a state government over jurisdiction of the rapidly growing event contracts industry.
A Public Safety Bill With a Felony-Level Bite
The ban was tucked inside SF4760, a broader public safety omnibus bill that passed the Minnesota House 100-32 and the Senate 57-9. Beginning 1 August, anyone operating or assisting in the operation of a prediction market faces criminal exposure that can reach felony level. The law extends liability beyond the platforms themselves to banks, payment processors, media organisations and even sports leagues that advertise, verify or supply data to Kalshi, Polymarket and similar venues.
Minnesota Attorney General Keith Ellison defended the law on consumer protection grounds. Representative Emma Greenman, who proposed the ban, framed it as a state sovereignty question: legislatures should be able to debate what forms of gambling are legal within their borders.
"This Minnesota law turns lawful operators and participants in prediction markets into felons overnight. Minnesota farmers have relied on critical hedging products on weather and crop-related events for decades. Governor Walz chose to put special interests first and American farmers and innovators last."
The Constitutional Question Is Heading for the Supreme Court
The CFTC's legal argument rests on the position that event contracts are federally regulated derivatives, governed exclusively by federal commodities law and subject to CFTC jurisdiction. The complaint calls Minnesota's law "the most aggressive move by a state to shut down CFTC-regulated markets and undermine the federal regulatory regime set up by Congress more than 50 years ago." The agency is seeking a preliminary injunction to block the law before it takes effect.
Kalshi spokesperson Elisabeth Diana called the ban "peak hypocrisy" in a statement, drawing a comparison to a state attempting to block access to the New York Stock Exchange. Polymarket said the case demonstrates how Minnesota's law "runs counter to the federal government's established framework for regulating prediction markets."
The Minnesota case is the fifth state lawsuit the CFTC has filed in 2026, joining active cases against Arizona, Wisconsin, New York and Illinois. The agency recently won a federal court order blocking Arizona's criminal case against Kalshi. Nevada remains the only state with a court-enforced ban on Kalshi currently in effect. Legal experts widely expect the constitutional question of whether prediction market contracts fall under federal or state authority to ultimately be decided by the Supreme Court.
The political subtext is harder to ignore. Donald Trump Jr. is both an investor in Polymarket through his firm 1789 Capital and a strategic adviser to Kalshi, which Representative Greenman cited in her response to the lawsuit. Kalshi's $22 billion valuation and Polymarket's $12 billion both depend on resolving the state-versus-federal question in their favour. The Minnesota case will likely set the precedent that determines the answer.
