Federal Judge Blocks Minnesota Prediction Market Ban Before August 1 Effective Date

U.S. District Judge Katherine M. Menendez blocked Minnesota from enforcing its new prediction market statute against CFTC-registered exchanges on July 27, four days before the law’s August 1 effective date. The preliminary injunction keeps KalshiEX LLC and QCX LLC, which operates Polymarket US, outside the reach of Minn. Stat. § 609.7615 while three related federal cases proceed in the District of Minnesota.

Menendez’s order in United States v. Minnesota, Case No. 0:26-cv-02661, granted preliminary injunction motions filed by the Commodity Futures Trading Commission, Kalshi and Polymarket US. The court enjoined Minnesota officials from enforcing Minn. Stat. § 609.7615, “as amended and adopted by SF 3432,” against entities registered with the CFTC as designated contract markets until a final decision on the merits is reached.

What did Minnesota’s prediction market law ban?

Minnesota enacted the operative prediction market provisions through SF 3432, Chapter 118, which Governor Tim Walz signed on May 26, 2026. The statute created Minn. Stat. § 609.7615 and set an August 1, 2026 effective date, according to the Minnesota Revisor of Statutes’ published session law.

The law made it a felony, for consideration and as part of a business, to create a prediction market, operate or manage a platform intended for consumers to make prediction market wagers, facilitate market operations, provide certain data or verification services to a prediction market, or provide supportive services used for location, funds transfer or payment processing. It also made advertising or marketing financial or technological products that promote prohibited transactions a felony.

The statute defined a prediction market as a system allowing consumers to place a wager on the future outcome of specified events not determined or affected by the parties to the contract. Covered categories included athletic events, games of skill, elections, government actions, legal outcomes, economic indicators, deaths or mass casualty events, popular culture events, and whether a person will make a particular statement.

That structure mattered in the litigation. Minnesota framed the measure as a gambling law aimed at commercial operators and supporting businesses. The plaintiffs framed it as a state attempt to bar federally regulated derivatives exchanges from offering contracts under federal oversight.

Who challenged the Minnesota law?

The CFTC and the United States filed United States v. Minnesota, Case No. 0:26-cv-02661, on May 19, 2026. Kalshi filed KalshiEX LLC v. Ellison, Case No. 0:26-cv-02778, on May 27. QCX LLC, operating as Polymarket US, filed a related case, QCX LLC v. Ellison, Case No. 0:26-cv-02841, which the District of Minnesota docket reflects as reassigned to Judge Menendez on June 4.

The cases were coordinated for preliminary-injunction briefing and argument. A June 15 District of Minnesota order added the QCX case to the same briefing schedule as the CFTC and Kalshi actions, with opposition briefs due June 18, replies due June 25 and oral argument set for July 2. A July 2 docket entry lists appearances for the CFTC, Kalshi, Polymarket US and Minnesota officials, and says the court heard argument on all three preliminary-injunction motions.

The plaintiffs’ central theory was federal preemption under the Commodity Exchange Act. Kalshi and QCX argued that they operate CFTC-registered designated contract markets and that Minnesota could not use state gambling law to prohibit federally regulated event contracts on those exchanges. The CFTC’s participation put the federal regulator directly on the side of preemption rather than leaving the platforms to litigate alone.

What did Judge Menendez decide?

Menendez granted the preliminary injunction because the plaintiffs showed a likelihood of success on their Commodity Exchange Act preemption claim, according to the July 27 order. The order states that Kalshi and QCX are financial services companies operating CFTC-registered designated contract markets and that users can purchase event contracts on sports, politics, culture and other outcomes through their platforms.

The injunction is narrow in one important respect. It bars enforcement of Minn. Stat. § 609.7615 against entities registered as designated contract markets by the CFTC. It does not erase the statute, decide the final merits, or resolve how Minnesota may apply gambling laws to businesses that are not federally registered exchanges.

The court’s order also leaves room for future fights over the status of specific contract types. In the preliminary-injunction analysis, Menendez treated the plaintiffs’ strongest argument as applying to swaps traded on CFTC-regulated exchanges. Contracts that do not fit within the Commodity Exchange Act’s protected categories could face a different analysis as the cases move beyond the preliminary stage.

For now, the ruling preserves the pre-August 1 status quo for federally registered exchanges. That is the practical effect for Kalshi and Polymarket US: Minnesota officials cannot use the new statute to force those CFTC-registered designated contract markets out of the state while the litigation continues.

How did Minnesota defend the statute?

Minnesota Attorney General Keith Ellison, Governor Tim Walz and other state defendants argued that the statute regulates gambling activity within the state’s traditional police powers. In a June 18 memorandum opposing Kalshi’s preliminary-injunction motion, the state defendants described the products as wagers and argued that federal exchange registration did not strip Minnesota of authority to regulate gambling-related conduct.

Ellison’s office also contested the platforms’ preemption theory at the threshold. The state position was that the Commodity Exchange Act does not give CFTC-regulated entities blanket immunity from state gambling law merely because an exchange holds a federal designation. That argument remains live even after the preliminary injunction because Menendez has not issued a final merits ruling.

The political stakes are also clear. Minnesota’s statute was written as a criminal prohibition, not a licensing dispute or civil regulatory scheme. If it takes effect against federally registered exchanges after later proceedings, it would create a direct state-level barrier to event-contract trading. If the plaintiffs ultimately win, the case would strengthen the argument that state gambling regulators cannot ban CFTC-supervised exchanges from offering covered contracts.

Why does the CFTC’s role matter?

The CFTC’s lawsuit turned the Minnesota case from a private platform challenge into a direct federal-state jurisdiction fight. The agency did not merely file an amicus brief. It sued Minnesota and sought the same preliminary relief as Kalshi and Polymarket US.

That posture matters because the CFTC is defending its own regulatory perimeter. Event contracts have become a pressure point between state gambling authorities and federal derivatives law, particularly as exchanges offer markets tied to sports, elections and culture. Minnesota’s statute treated those products as wagers in a criminal code provision. The CFTC and the exchanges treated at least the federally listed contracts as instruments governed by the Commodity Exchange Act.

The District of Minnesota order cited the platforms’ CFTC registrations and enjoined enforcement only as to registered designated contract markets. That framing gives the ruling industry-wide significance without turning it into a blanket approval of every prediction market or every event contract. It protects the federally registered exchange model during the litigation, while leaving narrower questions for later proceedings.

How does this fit with other state prediction market cases?

Minnesota is part of a broader state-versus-federal fight over whether event contracts should be regulated mainly as gambling products or financial derivatives. Similar disputes have touched New York, Massachusetts, Tennessee, Arizona and New Jersey, with state officials questioning sports and event markets while exchanges point to CFTC oversight.

The most important existing appellate marker is the Third Circuit’s April 6, 2026 decision in KalshiEX LLC v. Flaherty, No. 25-1922. In that case, the Third Circuit held that the Commodity Exchange Act preempted New Jersey gambling enforcement against Kalshi’s sports-event contracts. That ruling does not bind the Eighth Circuit, which covers Minnesota, but it gives Kalshi and other CFTC-registered exchanges a federal appellate precedent to cite.

Menendez’s order therefore does not create the first circuit-level answer to the preemption question. It creates the leading district-court ruling inside the Eighth Circuit on Minnesota’s criminal prediction market statute, and it does so before the law ever took effect.

Can CFTC-registered exchanges operate in Minnesota now?

Yes, the July 27 injunction prevents Minnesota officials from enforcing Minn. Stat. § 609.7615 against CFTC-registered designated contract markets while the cases continue. That means the state cannot use the new statute to prosecute Kalshi, Polymarket US or similarly registered exchanges for covered operations during the injunction period.

The order does not answer every access question for Minnesota users. It speaks to state enforcement against CFTC-registered designated contract markets, not to every operational choice an exchange may make about account access, market availability or compliance controls.

What happens next in the Minnesota cases?

The three related cases remain active in the District of Minnesota: United States v. Minnesota, No. 0:26-cv-02661; KalshiEX LLC v. Ellison, No. 0:26-cv-02778; and QCX LLC v. Ellison, No. 0:26-cv-02841. The preliminary injunction keeps enforcement paused against CFTC-registered designated contract markets while the court considers the merits.

The next material question is whether Menendez converts the preliminary preemption analysis into a final ruling, and whether Minnesota seeks review in the Eighth Circuit. A final district-court decision or an Eighth Circuit ruling would determine how much room Minnesota has to apply its gambling laws to federally registered event-contract exchanges after August 1, 2026.