Minnesota Governor Tim Walz this month signed legislation that makes the state the first in the United States to formally ban prediction markets, prohibiting platforms like Kalshi and Polymarket from accepting Minnesota residents. Within 72 hours, Kalshi filed a federal lawsuit arguing that the state ban is preempted by federal Commodity Futures Trading Commission authority. The case is now the most-watched gambling regulation lawsuit in the country, with potential to reshape the boundaries between state gambling laws and federal derivatives oversight.
Quick answer: Minnesota became the first US state to explicitly ban prediction markets in May 2026, prohibiting Kalshi and Polymarket from accepting Minnesota residents. Kalshi filed a federal lawsuit arguing federal CFTC authority preempts state gambling law. The case is expected to reach the federal appeals court in late 2026 with national implications for gambling regulation. 41 state attorneys general have separately petitioned the CFTC to halt event contract approvals.
What Minnesota's New Law Does
The Minnesota legislation, HF 2154, defines event contracts that pay out based on sports, election, or entertainment outcomes as "gambling" under Minnesota law. Operating such a market without a Minnesota gambling license — which is essentially impossible to obtain for an out-of-state federally regulated platform — becomes a felony offense punishable by up to five years imprisonment.
The law also imposes a $500,000 per-incident civil penalty on platforms that knowingly accept Minnesota wagers. Banks and payment processors are required to block transactions to identified prediction market platforms, with civil liability if they fail to comply.
Walz, in signing the legislation, emphasized state authority over gambling: "Minnesotans deserve consumer protection, integrity oversight, and tax revenue from any gambling product available in our state. We will not allow federal regulators to override constitutional state authority."
Kalshi's Federal Lawsuit
Kalshi's federal complaint, filed in the District of Minnesota, makes three core arguments:
- Preemption: The Commodity Exchange Act preempts state law for any product the CFTC has approved as a futures or swap contract.
- Commerce Clause: The Minnesota ban impermissibly burdens interstate commerce by targeting a federally regulated financial product.
- Equal Protection: The ban arbitrarily distinguishes between Minnesota-resident participation in CFTC-approved markets versus other federally regulated financial products.
Kalshi is asking for a preliminary injunction blocking enforcement of HF 2154 while the case proceeds. A hearing on the injunction is set for early July.
The CFTC's Position
The CFTC has not formally joined Kalshi's case but has issued statements supporting federal authority over event contracts. CFTC Chair Rostin Behnam testified before Congress in May that the agency considers sports-related event contracts within its statutory mandate. The agency has approved several contract types Kalshi offers, including NFL game outcomes and NBA Finals winner contracts.
Some prediction market advocates believe the CFTC will file an amicus brief supporting Kalshi's preemption argument. If so, that would significantly strengthen Kalshi's position in federal court.
Constitutional Stakes
This case will likely produce one of the more significant federal preemption rulings in gambling history. The core constitutional question: does CFTC approval of a financial product override state authority to regulate gambling within state borders?
Historical precedent is mixed. Federal preemption has prevailed in cases involving banking, securities, and interstate insurance. State authority has prevailed in cases involving traditional gambling, including sports betting before the Supreme Court's 2018 PASPA ruling. Event contracts sit at the legal intersection — they are financial products that pay based on outcomes that gambling laws address.
Most legal scholars expect the case to reach the Eighth Circuit Court of Appeals by Q4 2026, with potential Supreme Court review in 2027. For background on PASPA and federal sports betting law, our US sports betting overview tracks the post-PASPA state-by-state legalization.
What Other States Are Doing
Minnesota is the first state to enact an explicit ban, but several others are weighing similar action. Massachusetts, New Jersey, and Maryland have all considered legislation that would ban or limit prediction market participation by residents. Texas's attorney general has taken an aggressive enforcement posture against prediction markets even without explicit legislation.
On the other side, three states (Wyoming, North Dakota, Utah) have indicated they will not act against prediction markets, viewing them as federally regulated financial products outside state authority. The patchwork is the worst-case scenario for both Kalshi and traditional sportsbooks — a national company must navigate 50 different regulatory regimes.
Industry Impact
For traditional sportsbooks (DraftKings, FanDuel, BetMGM, Caesars, ESPN Bet), the Minnesota ban is unambiguously positive. Prediction markets compete directly for sports betting handle, particularly on high-volume markets like NFL games and NBA Finals. Minnesota's sports betting market — currently dominated by FanDuel and DraftKings — gains an estimated $200 million in annual handle as prediction market alternatives are removed.
For prediction market operators, the ban is a significant setback that could spread. Kalshi reports approximately $80 million in 2025 handle from Minnesota — about 2 percent of total volume. Losing one state is manageable; losing 10 states would force a fundamental business model rethink.
For state-licensed operators, see our current promotional coverage at best sportsbook promos — Minnesota-resident bettors have full access to all licensed operators.
Polymarket's Position
Polymarket, the larger of the two major prediction market platforms, has officially maintained that its products are not gambling and that it complies with US law. However, Polymarket's operating structure is more complex than Kalshi's — Polymarket is based offshore but accepts US users through specific compliance frameworks. The Minnesota ban specifically targets all prediction market platforms regardless of legal structure.
Polymarket has not filed its own lawsuit yet but is expected to join Kalshi's case as a friend of the court or file a parallel action. The two platforms' interests are aligned even though they operate under different regulatory frameworks.
Tax Implications
One under-reported aspect of the dispute: state tax revenue. Traditional sports betting in Minnesota generates roughly $35 million in annual tax revenue at the current 15 percent tax rate. Prediction markets, as federally regulated financial products, pay zero state gambling tax. The ban effectively redirects $200M+ in annual handle from non-taxed federal products to taxed state-licensed sportsbooks.
This is the underlying fiscal motivation for state opposition to prediction markets. Every dollar of prediction market handle is a dollar of foregone state tax revenue — and state legislatures have noticed.
What's Next
The injunction hearing in early July is the next major milestone. If Kalshi wins, the Minnesota ban is paused while litigation continues — meaning Minnesotans could still access prediction markets. If Kalshi loses, the ban remains in effect and other states are likely to enact similar legislation.
Beyond the legal proceedings, Congress is also weighing comprehensive legislation. Several proposals would define event contracts versus gambling explicitly, potentially creating a national framework that supersedes both Minnesota's ban and the CFTC's current approval authority. Any Congressional action would likely take 18-24 months.
Frequently Asked Questions
Why did Minnesota ban prediction markets?
Minnesota argues that prediction markets are functionally sports gambling without the consumer protections, integrity controls, and tax revenue requirements of state-licensed sportsbooks. The state asserts constitutional authority over all gambling within state borders.
Can Minnesotans still use Kalshi?
Currently no, while the litigation proceeds. Kalshi is required to block Minnesota residents from making bets unless and until the federal courts grant an injunction against the ban.
What are the chances Kalshi wins the lawsuit?
Legal experts are split. The CFTC's approval of event contracts gives Kalshi a strong preemption argument, but state gambling authority is historically broad and respected by federal courts. Most expect a 3-2 split in any appellate court ruling.
Are other states considering bans?
Yes. Massachusetts, New Jersey, and Maryland have all considered legislation. Texas has taken aggressive enforcement posture even without legislation. Three states (Wyoming, North Dakota, Utah) have indicated they will not act.
How does this affect regular sports bettors?
Minnesotans who use state-licensed sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) are unaffected. Minnesotans who used prediction markets must now use state-licensed operators only.
Conclusion: The Defining Gambling Regulation Case of the Decade
The Minnesota-Kalshi case is shaping up to be the most consequential gambling regulation case in 30 years — potentially as significant as the 2018 PASPA decision. The outcome will determine whether prediction markets can scale into a national category or are forced to operate state by state. For the gambling industry broadly, the case is a referendum on the relationship between federal financial regulation and state gambling authority. Watch this case closely. For our complete ongoing coverage of US gambling regulation and current state-by-state status, see our sports betting guide. The federal court calendar will determine the next chapter.
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