Rhode Island Attorney General Peter Neronha filed dueling state court lawsuits Wednesday against prediction market platforms Kalshi and Polymarket, alleging that the companies are unlawfully conducting sports gambling in Rhode Island without state authorization. The action makes Rhode Island the latest state to challenge the fast-growing prediction market sector and follows Minnesota's first-in-the-nation prediction market ban earlier in May.
Quick answer: Rhode Island Attorney General Peter Neronha filed lawsuits against Kalshi and Polymarket in state superior court on May 21, 2026, alleging that the prediction market platforms are illegally offering sports gambling to Rhode Island residents without state regulatory authorization. The cases follow Minnesota's first-in-the-nation prediction market ban and an ongoing federal lawsuit by the Trump administration challenging that ban. Massachusetts, Michigan, Nevada, New Jersey, and Ohio have also taken similar actions.
What the Rhode Island Lawsuits Allege
The Rhode Island filings argue that Kalshi and Polymarket are functionally operating as sports betting platforms inside the state without going through the regulatory pathway established by the Rhode Island Lottery, which holds exclusive authority over the state's sports wagering market. AG Neronha's office cites the volume of sports-related event contracts trading on both platforms as evidence that the products fit the state's statutory definition of gambling.
Specific claims in the filings:
- Both platforms accept Rhode Island residents without state-authorized geofencing
- The sports-related event contracts qualify as illegal gambling under Rhode Island law
- The platforms bypass the consumer protection framework applicable to licensed sportsbook operators
- Tax revenue is diverted from the state's regulated sports betting framework
- Self-exclusion lists are not honored by the prediction market platforms
The state is seeking declaratory judgment that the activity is illegal under Rhode Island law and injunctive relief preventing further operation in the state. No specific monetary damages claims were included in the initial filings.
Kalshi's Federal Response
Kalshi has taken an aggressive legal posture in response to state actions. The company filed its own federal lawsuit against Rhode Island officials on the same day, asking the federal court to declare that Kalshi's event contracts are regulated by the Commodity Futures Trading Commission (CFTC) and therefore preempted from state-level gambling enforcement. The dueling federal-state litigation creates a complex jurisdictional contest that will likely take 18-24 months to resolve.
This pattern of dual-track federal and state litigation has become Kalshi's standard approach. The company has filed similar federal preemption lawsuits in Nevada, New Jersey, and Massachusetts, and has prevailed at the preliminary injunction stage in several of those cases.
The Broader Multi-State Conflict
Rhode Island joins a growing list of states actively challenging prediction market platforms:
- Minnesota: Governor Walz signed nation's first prediction market ban; Trump administration suing in federal court
- Massachusetts: State gaming commission ordered Kalshi cease-and-desist; lawsuit pending in federal court
- Michigan: Gaming Control Board issued cease-and-desist orders; court case ongoing
- Nevada: Gaming Control Board issued cease-and-desist; federal court issued preliminary injunction in Kalshi's favor pending appeal
- New Jersey: Division of Gaming Enforcement issued cease-and-desist; injunction pending
- Ohio: Casino Control Commission challenged the platforms; state court case pending
The collective state pressure represents a major test of whether prediction markets can operate as a federally regulated category that supersedes state gambling laws, or whether state gambling authority extends to event contracts that resemble sports wagers.
Why Sports Betting Is at the Center
On Kalshi specifically, more than 85% of trading activity is now tied to sporting events, including parlay-style contracts that mirror traditional sportsbook offerings. That concentration is precisely what state attorneys general are pointing to as evidence that the platforms have become de facto sportsbooks operating outside state regulatory frameworks.
The legal question is whether the platforms' use of an "event contract" structure, regulated by the CFTC at the federal level, immunizes them from state gambling laws. Kalshi argues yes. State regulators argue that the function of the product, not its legal structure, determines whether state gambling laws apply.
For players who want to bet on sports through fully state-regulated frameworks, the established legal sportsbook market offers comprehensive consumer protection. Our US sports betting guide tracks the regulated market state-by-state.
The Trump Administration's Federal Pushback
The Trump administration's federal lawsuit against Minnesota's prediction market ban introduced a new dynamic into the conflict. The Department of Justice filed the suit on the theory that CFTC-regulated event contracts cannot be banned by individual states because federal commodities regulation preempts state action.
If the federal court agrees with the administration's position, the implications would extend far beyond Minnesota. State-level enforcement actions against Kalshi and Polymarket would face strong preemption challenges, and the patchwork of state cease-and-desist orders could be overturned in a single ruling.
The Minnesota case is being closely watched by every state regulator that has taken action against the platforms, including Rhode Island. Outcomes there will likely shape strategy in the Rhode Island litigation directly.
What's at Stake for Players
For Rhode Island residents currently using prediction market platforms, the immediate impact is unclear. Kalshi and Polymarket have continued to operate during ongoing legal challenges in other states, and the platforms' typical response to state actions has been to continue operating while challenging the cases in federal court. A formal Rhode Island injunction would require the platforms to geofence the state, which could take weeks to implement.
For the broader gambling industry, the litigation outcomes will determine whether prediction markets become a competing channel that operates outside the state-licensed sportsbook framework or whether they are absorbed into state regulatory schemes (potentially through a hybrid licensing approach being floated by some industry observers).
What the Industry Is Saying
Legal sportsbook operators (DraftKings, FanDuel, BetMGM, Caesars) have largely backed state enforcement actions, arguing that prediction market platforms are operating with an unfair regulatory advantage. State gaming associations including the American Gaming Association have filed amicus briefs supporting state authority in several of the pending cases.
The Sports Betting Alliance, which represents major U.S. sportsbook operators, issued a statement calling the Rhode Island filings "a necessary step to protect consumers and ensure that all sports gambling operates under the same regulatory standards." That position aligns with the broader strategic interest of licensed operators that pay state tax rates ranging from 15% to 51% on gross gaming revenue.
Frequently Asked Questions
What did Rhode Island file against Kalshi and Polymarket?
Rhode Island Attorney General Peter Neronha filed lawsuits in state superior court on May 21, 2026, alleging that Kalshi and Polymarket are conducting illegal sports gambling in Rhode Island without state authorization. The state seeks declaratory judgment and injunctive relief.
Are prediction markets legal in the United States?
Prediction markets operate under CFTC federal commodities regulation, but several state attorneys general argue that the platforms' sports-related contracts function as illegal gambling under state law. The legal status varies by state and is subject to ongoing litigation.
How is this related to the Minnesota prediction market ban?
Minnesota became the first state to formally ban prediction markets in May 2026. The Trump administration sued to overturn the ban on federal preemption grounds. Rhode Island's lawsuits represent a parallel state-level enforcement action through litigation rather than legislation.
What does this mean for sports bettors?
Sports bettors in Rhode Island and other states facing prediction market challenges should consider sticking to state-regulated sportsbooks that operate under explicit state authorization. Regulated operators offer consumer protections, dispute resolution processes, and state-level oversight that prediction market platforms do not.
What Happens Next
The legal battle over prediction markets is now multi-front, with federal litigation in Minnesota, state and federal cases in Rhode Island, and pending injunctive proceedings in at least five other states. Resolution will likely require either a U.S. Supreme Court ruling on federal preemption or a coordinated congressional intervention that creates a unified federal-state framework for event contracts.
For ongoing coverage of regulatory developments in the U.S. gambling industry and how they affect bettors and operators, follow the latest articles at DeucesCracked.
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