Federal Judge Blocks Minnesota Prediction Market Ban, Citing Federal Preemption

Woofun AI reports that a federal judge has blocked Minnesota’s attempt to ban prediction markets, issuing a preliminary injunction in favor of Kalshi, Polymarket, and the Commodity Futures Trading Commission (CFTC). Judge Katherine Menendez of the U.S. District Court for the District of Minnesota determined that the state’s recent legislation likely conflicts with federal law, effectively pausing enforcement while the legal battle continues.

The legal foundation of the ruling rests on the Commodity Exchange Act (CEA), which the plaintiffs argue preempts state-level restrictions on swaps. Minnesota’s statute, passed earlier this year, criminalized the operation of prediction markets within its borders, prompting the lawsuit. On Monday, Judge Menendez concluded that the plaintiffs are likely to succeed in demonstrating that the CEA expressly preempts these state regulations, thereby affirming the CFTC’s jurisdiction over such financial instruments.

Structurally, the court’s analysis focused on whether the state law attempts to regulate trades in event contracts that qualify as swaps under the CEA. The judge noted that while some contracts, such as those predicting outcomes of the TV program "Love Island", might fall outside federal oversight, it would be impractical to craft an injunction targeting only those specific issues. Consequently, the ruling broadly protects the platforms operated by Kalshi and Polymarket US from the state’s regulatory reach.

Per Woofun AI, the decision emphasizes that failing to halt the law would cause irreparable harm to the involved companies. The preliminary injunction remains in effect until a final decision on the merits is reached, ensuring that the CFTC’s authority to oversee swaps is not undermined during the litigation process. This procedural status maintains the current operational landscape for prediction market operators in the state.

This ruling marks a significant setback for state-level attempts to regulate trades that fall under federal commodity jurisdiction. The halt of the law ensures that Kalshi and Polymarket can continue operations without immediate legal penalty, pending a full trial. The outcome underscores the tension between state legislative ambitions and federal regulatory frameworks in the emerging prediction market sector.