Federal Judge Denies Polymarket’s Bid to Halt Michigan Gambling Enforcement on Prediction Markets
A federal judge has denied Polymarket’s request for a preliminary injunction that would have blocked Michigan Attorney General Dana Nessel from enforcing state gambling laws against prediction market operators. In a 34-page opinion issued June 17, U.S. District Judge Paul Maloney ruled that Polymarket failed to show it was likely to succeed on the merits of its claims. This decision adds momentum to the legal battle over whether sports-related prediction markets qualify as federally regulated financial products or as sports betting subject to state authority.
The outcome underscores the tension between federal oversight and state police powers. It also signals that operators face an uphill battle when seeking to pause enforcement while the underlying questions remain unresolved. As someone who has spent decades observing the evolution of gaming regulation, I see this as another inflection point in how the industry navigates competing legal frameworks.
Legal Fight Centers on Sports Prediction Contracts
Michigan alleges Kalshi illegally offered sports wagering products to residents while attempting to classify them as federally regulated event contracts. State officials argue the markets function similarly to sportsbooks and therefore fall under Michigan gaming law.
Polymarket intervened in the case, even though the underlying enforcement action targets Kalshi. The company contended that the state’s position threatens federally regulated prediction market exchanges more broadly. Polymarket filed a notice of appeal to the 6th U.S. Circuit Court of Appeals the same day the ruling was issued.
This intervention reflects the shared stakes across prediction market operators. The core dispute is whether these products can operate under federal commodities rules or must comply with state-by-state gaming requirements.
Judge Rejects Federal Derivatives Classification
A central issue involved whether sports-event contracts qualify as federally regulated “swaps” under commodities law. Polymarket argued its contracts fall within the CFTC’s jurisdiction.
Judge Maloney disagreed. He wrote that Congress intended derivatives laws to regulate sophisticated financial products tied to systemic market risk, not products resembling sports wagers.
“It is clear that Congress intended the definition of swap to capture a set of products in the financial industry which caused the 2008 financial crisis,” Maloney wrote, “and not to place broad swaths of everyday economic activity under the authority of the Commodity Futures Trading Commission.”
This interpretation directly challenges the preemption argument that operators have relied upon.
From my perspective, this judicial framing highlights a structural shift. Prediction markets sit at the intersection of innovation and long-established gaming rules. Operators must now weigh how aggressively to defend their federal classification while state actions continue.
States Retain Broad Gambling Authority
Judge Maloney repeatedly emphasized that states have historically maintained broad authority to regulate gambling within their borders. The opinion described gambling regulation as being “at the heart of states’ police powers.”
He added that federal courts should hesitate before interfering with those responsibilities absent clear congressional intent. The judge also weighed the competing harms facing both sides, concluding the public interest in allowing Michigan to enforce its gambling laws outweighed Polymarket’s business concerns.
This deference to state authority represents a risk for prediction market platforms. While federal registration with the CFTC offers one layer of legitimacy, it does not automatically shield operators from aggressive state enforcement.
A counterargument worth noting is that treating these contracts purely as gambling could stifle legitimate financial innovation. Yet the court’s focus on congressional intent and systemic risk suggests judges are wary of expanding derivatives definitions too broadly. This limitation may force operators to pursue clearer legislative pathways rather than litigation alone.
Appeals Could Shape the Industry’s Future
The Michigan case is one of several legal battles shaping the future of sports prediction markets nationwide. Multiple states have challenged sports-event contracts offered by companies including Kalshi and Polymarket, arguing they function as unlicensed sports betting.
Prediction market operators maintain the contracts are federally regulated through the CFTC and cannot be prohibited by individual states. The legal landscape remains unsettled.
Federal courts in Michigan and Ohio have recently sided with state regulators, while separate litigation in Tennessee has been viewed as more favorable to prediction market companies. Maloney’s ruling does not resolve the broader dispute, but it gives state regulators another early victory as appellate courts prepare to weigh in.
Legal experts expect the issue could eventually reach the US Supreme Court if federal circuits issue conflicting rulings. The appeals process will test the strength of the preemption theory and could determine how prediction markets secure licensing across jurisdictions.
The Bottom Line
This decision reinforces state authority over activities resembling sports betting while casting doubt on broad CFTC preemption for sports-event contracts. It creates near-term operational uncertainty for platforms but also clarifies the high bar for preliminary relief. Operators and their advisors should monitor the 6th Circuit appeal closely, as its outcome may influence licensing strategies and regulatory negotiations in multiple states. For client-partners navigating these developments, the path forward lies in aligning innovation with evolving legal realities rather than assuming federal rules will override state police powers. Those seeking guidance on these matters can review our advisory services at https://sccgmanagement.com/our-services/.
