Kalshi and Polymarket are facing an expanding legal fight across the United States over whether sports-related event contracts should be treated as federally regulated derivatives or as state-regulated gambling.

The dispute now spans at least a dozen states and includes cease-and-desist orders, competing lawsuits, preliminary injunctions and, in Arizona, criminal charges against Kalshi. The central question is jurisdictional: the platforms argue that their event contracts are derivatives regulated by the Commodity Futures Trading Commission, while state gaming regulators say the products amount to unlicensed sports betting. Roughly 90% of Kalshi’s trading volume is tied to sports.

The CFTC has taken the platforms’ side in an unusually direct way. The agency has sued Connecticut, Arizona and Illinois to defend what it says is its exclusive jurisdiction over federally registered exchanges. The litigation has placed a federal financial regulator in direct conflict with state governments on behalf of its registrants, while the agency is operating with a single confirmed commissioner.

Court outcomes remain divided. Federal judges have blocked state enforcement in Arizona, Tennessee, Ohio and Connecticut, while New York, Massachusetts, Nevada, Maryland and Washington have delivered wins for state regulators. Three California tribes are also pursuing an appeal at the Ninth Circuit.

The result could matter well beyond prediction markets. The same preemption question — whether federal market regulation can displace state gambling, consumer-protection and police-power laws — is also central to the market-structure framework that would make the CFTC a leading regulator for digital assets under the CLARITY-era architecture.

The United States is now running a real-time legal experiment in which the same companies, offering substantially the same products, can be treated as legal, illegal, criminal or federally protected depending on the state and the court order in force. Kalshi and Polymarket, whose sports contracts processed billions of dollars this year, including more than $1 billion on the Super Bowl alone by Kalshi’s count, are in active disputes with at least twelve states. Arizona has filed criminal charges. Massachusetts, Nevada and Washington have injunctions in place. A federal judge in New York recently sided with state regulators, while federal judges in Tennessee, Ohio and Arizona sided with the platforms.

JUST IN: Washington state judge grants preliminary injunction against Kalshi The ruling deems the prediction market activities illegal gambling under state law pic.twitter.com/u7rY35nZw4 — crypto.news (@cryptodotnews) July 21, 2026

How the dispute became a federalism fight

Kalshi is a designated contract market that has been federally licensed by the CFTC since 2020. Polymarket returned to the U.S. market through its acquisition of a CFTC-licensed exchange and clearinghouse. Both companies offer event contracts: instruments that pay out based on the outcome of real-world questions, such as an election, a temperature threshold or a football game. Prices are set by trading rather than by a bookmaker’s line.

The platforms’ legal theory rests on the Commodity Exchange Act, which grants the CFTC exclusive jurisdiction over transactions on registered exchanges. Under that reading, states have no more authority over a Kalshi sports contract than over a corn futures contract traded in Chicago, and the Supremacy Clause bars conflicting state enforcement.

State regulators view the products differently. Their position is that if a platform looks like a sportsbook, accepts money like a sportsbook and pays out like a sportsbook, it is a sportsbook. Sportsbooks are licensed, taxed and policed under state gambling law, or banned in jurisdictions that do not permit them.

State gaming regulators from New York to Nevada issued cease-and-desist orders through late 2025 and early 2026. Tennessee demanded that platforms void unsettled sports trades by a deadline. Arizona escalated to criminal charges, including under its election-betting prohibition. The platforms’ response in many cases has been to file first in federal court, arguing that state law is preempted. Kalshi’s approach has become so routine that it sued Illinois before the state’s own action arrived.

The CFTC’s entry turned a collection of state disputes into a broader federalism conflict. In April, the agency sued Connecticut, Arizona and Illinois, arguing that state enforcement intrudes on exclusive federal jurisdiction. Chairman Michael Selig publicly pledged to defend market participants against what he described as overzealous state regulators. A federal financial regulator litigating offensively against states, on behalf of its own registrants and in defense of sports contracts, has few modern parallels. The administration’s alignment is also notable: the president’s son advises both platforms, and the agency’s litigation calendar has become closely tied to the industry’s position.

LATEST: CFTC launches public comment period on a framework to assess events supporting prediction market contracts. The initiative provides clear rules to scrutinize designated contracts as directed by congress while permitting legitimate markets to move forward in the public… pic.twitter.com/5fLDPYp2rs — crypto.news (@cryptodotnews) June 11, 2026

The court record is split

Neither side has established a decisive advantage in court.

The platforms have recorded significant victories. Federal courts blocked state enforcement in Tennessee, where a judge issued a restraining order within days of the state’s deadline, as well as in Arizona, Ohio and Connecticut. The Ninth Circuit also granted an injunction protecting the preemption theory in the CFTC’s own case. Those rulings have generally emphasized the statutory text: if Congress gave the CFTC exclusive jurisdiction, states cannot criminalize activity that federal law licenses.

The states have also won important cases, especially in more recent rulings. Massachusetts secured a preliminary injunction blocking Kalshi. Nevada’s Gaming Control Board has an injunction against Polymarket. Washington state also secured a preliminary injunction against Kalshi after a judge deemed the prediction-market activity illegal gambling under state law. Maryland broke the early pro-federal trend with a ruling that state gambling law can reach the contracts. A federal judge in New York sided this month with the state’s gaming commission against Kalshi, a decision the company is appealing.

The tribal litigation adds another layer. Three California tribes argue that sports contracts violate the Indian Gaming Regulatory Act, the federal statute underlying tribal gaming economics. After a district court denied their request for an injunction, they took the case to the Ninth Circuit. That appeal places two federal statutory systems — commodities law and Indian gaming law — in direct conflict.

LATEST: Goldman Sachs restricts staff prediction market activity to sports and entertainment pic.twitter.com/PleleGOYs4 — crypto.news (@cryptodotnews) July 10, 2026

The practical result is a compliance environment that changes by district and can shift at the appellate level. Guidance circulating among users — such as keeping balances small, withdrawing after settlement and documenting positions — resembles guidance associated with gray-market activity rather than federally regulated exchanges.

Rhode Island’s attorney general, who sued both platforms in May, summarized the states’ position by arguing that the companies are evading gambling law and that the evasion is the business model. Kalshi’s filings present the opposite view: these are exchange-traded assets with values determined by market forces, and a state cannot regulate a federal market simply because it objects to the underlying question.

What the platforms, states and crypto industry are fighting over

The legal doctrine is only part of the dispute. The commercial stakes explain why the fight has become so intense.

For the platforms, sports is central to the business. Roughly 90% of Kalshi’s trading volume and about half of Polymarket’s volume is sports-related. Election markets made prediction markets widely known, but they are seasonal. Football is annual, and Kalshi’s reported $1 billion in Super Bowl trading showed that sports event contracts had become the category’s most important product.

That product competes with a licensed sports betting industry estimated at $150 billion a year. Licensed sportsbooks pay state taxes, operate under state consumer-protection rules and help fund state budgets. Prediction-market platforms argue that those rules are inapplicable to federally regulated contracts. If the platforms’ preemption theory holds, it would create a regulatory and tax advantage worth billions of dollars annually.

For states, the issue is whether decades of gambling federalism survive financial structuring. U.S. law has historically allowed each state to set its own gambling policy, from Nevada’s permissive model to Utah’s prohibition and the post-2018 patchwork of sports-betting regimes. The platforms’ theory, if accepted broadly, would move any activity structured as an exchange-traded contract into federal jurisdiction, beyond state reach, regardless of the subject matter.

The immediate dispute concerns sports, but the platforms have listed contracts on topics ranging from awards shows to weather. If the theory prevails, state gambling regulators could become less relevant while consumer-protection systems built around betting — including self-exclusion lists, age enforcement and problem-gambling funding — would apply mainly to the legacy licensed industry.

For crypto, the dispute is a preview of a wider market-structure fight. The CFTC’s assertion of exclusive jurisdiction against state regulators resembles the framework that digital-asset legislation such as the CLARITY Act would generalize: federal commodity oversight displacing state-by-state regulation of digital assets. Polymarket runs on crypto rails, and both platforms have become regulatory success stories in the Trump era. The CFTC is carrying that position while operating with one confirmed commissioner, a capacity issue already raised in Senate market-structure negotiations.

If courts conclude that CFTC exclusivity must yield to state police powers when a product resembles something states traditionally regulate, that reasoning could affect future crypto preemption arguments. Prediction markets are litigating a version of crypto’s constitutional question first, at scale, through a product that state regulators and tribal plaintiffs say looks like betting.

The tribal case before the Ninth Circuit

The tribal front may be the most legally significant part of the dispute.

The Indian Gaming Regulatory Act of 1988 is not simply a gambling statute. It is the framework under which tribal casinos operate and under which class III gaming is conducted through tribal-state compacts. Those compacts are central to modern tribal economies: states grant exclusivity or market access, tribes share revenue and accept regulatory terms, and the resulting gaming industry funds tribal governments at a scale few other sectors can match.

California’s compacts, which are at issue in the current litigation, give the state’s tribes a protected position in gaming within California. That position includes the state’s sports-wagering ban, which California voters reaffirmed when they rejected commercial sports betting at the ballot.

The platforms’ preemption theory would cut through that structure. If a sports event contract is a CFTC-regulated commodity outside state gambling law, it is also outside the tribal-state compacts. The three California tribes suing argue that prediction markets are effectively conducting unlicensed class III gaming in their protected market, in violation of a federal statute Congress wrote specifically to govern gaming. The platforms’ preemption claim rests on a statute Congress wrote to regulate commodity futures.

A district judge denied the tribes’ injunction request, and the appeal now places two federal schemes before the Ninth Circuit, which covers the country’s largest tribal gaming economy. Such conflicts between federal statutes are often the kind of issue the Supreme Court eventually resolves, particularly when tribal sovereignty is implicated.

The tribal litigation also changes the politics of the wider fight. State regulators can be described as defending tax revenue, and sportsbooks can be described as protecting margins, but tribal governments defending compact rights carry a different legal and moral position. Their involvement reframes the dispute as a question of whether financial engineering can undo statutory commitments made to tribes. A ruling for the tribes at the Ninth Circuit would also give other plaintiffs a federal statutory argument that is harder to answer with a simple Supremacy Clause claim.

Possible paths to resolution

The dispute has three broad paths.

The first is Supreme Court review of the preemption issue. The lower-court landscape is moving toward a classic certiorari setup, with federal judges disagreeing about the same statutory question across Tennessee, New York, Maryland and the Ninth Circuit. The tribal case adds a direct federal statutory conflict, while Washington’s preliminary injunction adds another state-level enforcement win to the record. A ruling for broad CFTC exclusivity would federalize event contracts and provide crypto with a powerful preemption precedent. A ruling preserving state police powers would turn the platforms’ national product into a state-by-state licensing patchwork.

The second path is congressional action. Event contracts sit in a statutory gap. The Commodity Exchange Act’s special-rule provisions on gaming were written before exchange-traded sports outcomes existed in their current form. Congress could resolve the issue through an amendment defining which event contracts are permissible and which remain subject to state gambling regimes. Sportsbook operators, tribes and states have aligned incentives to seek such language, while the platforms have support from the current administration. Any moving financial-services bill, including CLARITY, could become a vehicle.

NEW: Kalshi adds $HYPE perpetuals to its trading lineup. The prediction market highlights the offering as exclusive to Kalshi pic.twitter.com/EVsy9Vijih — crypto.news (@cryptodotnews) June 12, 2026

The third path is continued litigation and attrition. The platforms can fund lawsuits from sports-related revenue. States can generate enforcement actions faster than appeals can resolve them. The operating environment could remain legal where an injunction protects the platforms and criminal or prohibited where it does not. That uncertainty imposes costs as institutional partners, payment processors and league data licensors price the platforms as higher-risk counterparties.

The betting-versus-trading question may sound semantic, but it is foundational. It asks whether the legal structure of a financial exchange can absorb any activity if it is packaged as a tradable contract, or whether some categories remain subject to state governance no matter how the contract is written. Crypto faced a version of that question for fifteen years before Congress moved toward a market-structure framework. Prediction markets have compressed a similar conflict into eighteen months, twelve states, one criminal docket and a federal agency litigating against state regulators.

The current answer — that legality depends on geography and appellate timing — is the one outcome all parties appear to regard as unstable, and it is the only one now in force.

Frequently asked questions

What are Kalshi and Polymarket, legally speaking?

Kalshi is a CFTC-designated contract market that has been federally licensed since 2020. Polymarket returned to the U.S. market by acquiring a CFTC-licensed exchange and clearinghouse. Both offer event contracts that pay out based on real-world outcomes, with prices determined by trading. Their position is that the contracts are federally regulated derivatives under the Commodity Exchange Act’s exclusive-jurisdiction provision and therefore beyond state gambling law.

How many states are involved?

At least a dozen states are involved through cease-and-desist orders, lawsuits or injunctions. New York, Connecticut, Illinois, Tennessee and other states issued cease-and-desist letters. Massachusetts, Nevada and Washington have preliminary injunctions. Rhode Island’s attorney general sued both platforms. Maryland ruled for state authority. Arizona filed criminal charges against Kalshi, including under its election-betting prohibition.

What role is the CFTC playing?

The CFTC is an active litigant. In April, it sued Connecticut, Arizona and Illinois to assert exclusive federal jurisdiction over registered exchanges. Chairman Michael Selig pledged to defend market participants against state enforcement. The agency’s posture is unusual because it is litigating offensively against states on behalf of registrants.

Who is winning in court?

Neither side has a clear lead. Federal courts blocked state enforcement in Tennessee, Arizona, Ohio and Connecticut, supporting the platforms’ preemption theory. New York, Massachusetts, Nevada, Washington and Maryland have produced wins for state regulators, and Kalshi is appealing the New York ruling. Three California tribes, which argue that sports contracts violate the Indian Gaming Regulatory Act, lost their initial injunction request but are now before the Ninth Circuit.

Why is sports so important to the platforms?

Sports accounts for most of the business. Roughly 90% of Kalshi’s trading volume and about half of Polymarket’s is sports-related. Kalshi reported more than $1 billion in trading on the Super Bowl alone. Sports contracts compete directly with licensed sports betting operators, which pay state taxes and operate under state consumer-protection requirements.

How is this connected to crypto?

The preemption issue is similar to the one embedded in digital-asset market-structure debates. The CLARITY Act would expand a model in which federal CFTC oversight displaces state-by-state regulation for certain digital assets. Polymarket operates on crypto rails, and future rulings on whether CFTC exclusivity gives way to state police powers could become important precedent for crypto regulation.

Could Congress resolve the dispute?

Yes. Congress could amend the Commodity Exchange Act or related statutes to define which event contracts are permitted nationally and which remain subject to state gambling laws. The sportsbook industry, tribes and states have aligned incentives to pursue such language, while the platforms benefit from support within the current administration.

What should users understand?

Users should understand that legality varies by state and can change with a single court ruling. Injunctions have frozen withdrawals or required the voiding of trades in some jurisdictions. The platforms remain federally regulated, but the state-law overlay remains unresolved, and account access in a particular state can change before litigation is complete. This is not legal or investment advice.

Disclaimer: This article is for information and educational purposes only and does not constitute financial, investment or legal advice. It describes active litigation with uncertain, jurisdiction-dependent outcomes. The regulatory status of the platforms discussed varies by state and can change quickly. Information is accurate as of July 21, 2026.