Kalshi Sues Minnesota Over Prediction Market Ban Set for August 2026

TLDR

• Kalshi filed a federal lawsuit against Minnesota over its prediction market ban.
• Minnesota’s SF 3432 is set to take effect on August 1, 2026.
• The law would make operating or advertising prediction markets a felony.
• Kalshi says the ban conflicts with CFTC authority over event contracts.
• The case adds to the federal-state fight over prediction market regulation.

Kalshi has filed a federal lawsuit against the State of Minnesota over a new law that would ban the operation and advertising of prediction markets in the state. The law, SF 3432, was signed by Minnesota Governor Tim Walz and is scheduled to take effect on August 1, 2026.

The company is seeking to block enforcement of the measure before it begins. Kalshi argues that Minnesota’s law conflicts with federal regulation of event contracts and places the company at risk of criminal penalties for offering products it says are lawful under federal oversight.

Kalshi Challenges Minnesota Ban in Federal Court

Prediction markets allow users to buy and sell contracts tied to the outcome of real-world events. These markets can cover topics such as elections, economic data, policy decisions, sports, and other public events. Contract prices move based on market expectations, and users may sell positions before an event is resolved.

Under Minnesota’s new law, operating or advertising prediction market services such as Kalshi and Polymarket would become a felony. State lawmakers backing such restrictions have raised concerns about gambling addiction, market abuse, and corruption linked to wagering on political or public events.

Kalshi’s complaint claims that the law violates the Supremacy Clause of the U.S. Constitution by interfering with the Commodity Futures Trading Commission’s authority over event contracts traded on designated contract markets. The company also argues that the measure violates its First Amendment rights by restricting advertising and communication about its services.

The lawsuit states that Minnesota’s law puts Kalshi in an “impossible choice” between stopping service in the state or risking criminal penalties. The company also says CFTC rules prevent it from discriminating against customers based on geography.

CFTC Authority Becomes Central Issue

The Minnesota case is part of a broader dispute over whether prediction markets should be regulated mainly by federal commodities law or by state gambling authorities. Kalshi and other platforms argue that event contracts fall under the CFTC’s jurisdiction when traded on federally regulated markets.

Several states have moved against prediction market platforms. Illinois has sent cease-and-desist orders to Kalshi and Polymarket, while other states have pursued similar restrictions. The Trump administration has also challenged state-level bans in places including Arizona, Connecticut, Illinois, and New York.

The White House Office of Management and Budget is reviewing a CFTC proposal that would set federal guidelines for prediction markets and event contracts. The review follows a March 2026 advance notice of proposed rulemaking that sought public comment on which event contracts may be barred as contrary to the public interest.

President Donald Trump has publicly supported the CFTC’s role in overseeing prediction markets. In a social media post, he said it was “critically important” for the agency to retain exclusive authority over the sector. His statement criticized state officials who support restrictions and said federal rules should guide the market.

State Regulators Raise Gambling Concerns

State officials and gambling regulators have argued that many prediction markets resemble online betting and should be subject to state gambling laws. Critics say contracts tied to elections, sports, and public events create risks that differ from traditional commodities trading.

Minnesota lawmakers have cited concerns that fast-growing prediction platforms could increase gambling-related harm and invite improper conduct by public officials or market participants. One example referenced in public debate involved Minnesota Senator Matt Klein, who was suspended by Kalshi after betting on his own primary race.

Other concerns have involved sensitive events and the use of nonpublic information. Reports cited in the debate have included cases where users placed wagers connected to major geopolitical or law enforcement events, raising questions about oversight and market integrity.

Supporters of prediction markets argue that these platforms produce useful public forecasts and operate under financial market rules when listed on regulated exchanges. They say state-by-state bans could fragment the market and conflict with federal supervision.

The Minnesota lawsuit may help shape the legal boundary between event contracts and gambling regulation. For Kalshi, the case concerns whether a state can block a federally regulated platform from serving residents. For Minnesota, the dispute centers on whether the state can apply criminal law to products it views as unauthorized betting.

The ban is set to begin on August 1, 2026, unless a court intervenes. Until then, the case adds to the national legal fight over prediction markets, CFTC authority, and the role of state gambling laws in digital event trading.