Washington state has just handed sports prediction markets their latest legal blow — and the pattern emerging across the country is starting to look less like isolated setbacks and more like a coordinated wall of state resistance.
Summary
Key takeaways
- Judge John McHale of King County Superior Court granted Washington state a preliminary injunction blocking Kalshi from offering sports-related event contracts, ruling the platform conducts illegal gambling under state law.
- The injunction takes effect no earlier than August 5, with additional materials from both sides due by August 3.
- The court ruled the federal Commodity Exchange Act does not preempt Washington state gambling regulations — the central legal question in the dispute.
- Kalshi is already barred from sports contracts in Nevada and Michigan; New York also denied Kalshi’s bid to block state enforcement earlier this month.
- Sports and gaming attorney Daniel Wallach says states have won 19 of the 23 judicial decisions on prediction-market injunctions to date.
Washington Court Issues Preliminary Injunction Against Kalshi
Judge John McHale of King County Superior Court granted the state’s motion for a preliminary injunction, concluding that Kalshi offers illegal gambling activities to Washington consumers and solicits bets from them on its platform. The ruling, filed Monday, is direct: the public interest and potential consumer harm from allowing Kalshi’s sports contracts to continue operating outweigh any harm to the company itself.
The court did not stop there. It also explicitly addressed the federal preemption question that sits at the core of every one of these battles — and ruled that the Commodity Exchange Act does not override Washington state’s gambling regulations. That finding alone makes the ruling significant beyond Washington’s borders.
Injunction timing and procedural review
The injunction will not take effect immediately. The court has scheduled review of additional materials from Kalshi and state officials by August 3, with the injunction itself set to take hold no earlier than August 5. Judge McHale also left a narrow procedural door open, noting that Kalshi’s experience negotiating with other states might help both parties find ways to protect Washington consumers before the order kicks in.
The Federal vs. State Fault Line
The dispute over sports prediction markets ultimately comes down to one question: who has the authority to regulate them? Kalshi, which is federally registered with the Commodity Futures Trading Commission, argues that CFTC oversight under the Commodity Exchange Act is exclusive — that state gambling laws simply cannot reach its products. Washington’s position is the opposite: sports event contracts, whatever their federal designation, operate as gambling under state law and are subject to state enforcement.
Judge McHale sided firmly with the state. His ruling that the CEA does not preempt Washington regulation directly contradicts the legal architecture Kalshi has been building its defense around. Kalshi fired back through a spokesperson, insisting that “states don’t have jurisdiction to regulate prediction markets” and pointing to favorable rulings including a precedent from the Third Circuit.
That response, though, is becoming harder to sustain with each new decision. The company’s federal preemption argument may still have legs in appellate courts or eventually before the Supreme Court — but at the preliminary injunction stage, state courts are not buying it.
A Nationwide Pattern States Are Winning
Similar injunctions in Michigan and Nevada
Washington is not an outlier. Kalshi is already barred from offering sports-event contracts in Nevada and Michigan. Last month, a Michigan judge issued a temporary restraining order blocking the platform from those contracts in the state. With Washington now likely joining that list, the geography of states where Kalshi can freely operate sports markets is shrinking.
New York and the CFTC’s federal counteroffensive
Earlier this month, a New York judge denied Kalshi’s request to block the state from enforcing its gambling laws against the platform — another loss at the preliminary stage. The federal government has not stayed passive, though. The CFTC sued New York in April seeking a declaratory judgment that federal law grants it exclusive authority over event contracts regulated by the agency. That case could eventually create the appellate conflict needed to bring the issue before the Supreme Court.
What makes this dynamic analytically interesting is the split between the federal regulatory posture — which is broadly supportive of prediction markets — and the state-level judicial outcomes. The CFTC is fighting in one court while state judges are reaching opposite conclusions in dozens of others. The institutional tension is real, and it is compounding quickly.
Market Position and Expert Perspectives
None of this legal turbulence has stopped Kalshi from growing. The platform remains the largest prediction market in the world by trading volume, well ahead of rival Polymarket. In June, Kalshi’s monthly trading volume reached $33 billion, compared to Polymarket’s combined $13.95 billion across its platforms, according to The Block’s data dashboard.
According to reporting by Fortune and Bloomberg, Kalshi’s growth accelerated sharply during the 2026 FIFA World Cup, where it doubled its own peak trading records from the weeks before the tournament. H2 Gambling Capital estimated that prediction-market activity reached roughly 27% of all legal US sports-betting volume during the World Cup, up from 9% at the start of the year. Kalshi CEO Tarek Mansour has attributed sports contracts as the primary engine behind those volume figures.
Legal expert commentary on judicial trends
Sports and gaming attorney Daniel Wallach, speaking to The Block, framed the Washington ruling as part of an unmistakable pattern. “To date, there have been 23 judicial decisions on whether a preliminary injunction or temporary restraining order should be issued in connection with prediction-market cases. The states have won 19 out of 23,” he said. “The tide is turning sharply in the states’ favor.”
Wallach went further, projecting what that trend line means in practice: Kalshi’s map for sports-related contracts could look “markedly different in six months than it did earlier this year when it was not the subject of any injunctions barring it from offering sports contracts.” His view is that while the Supreme Court will ultimately settle the federal-versus-state question — likely within a few years — Kalshi faces a shrinking operational footprint for sports markets in the meantime.
The contrast between Kalshi’s trading volume dominance and its mounting state-level legal exposure captures the central tension in the sports prediction markets story right now. The platform is bigger than ever commercially, yet the legal ground beneath its sports contracts is being carved away state by state. A Supreme Court resolution may vindicate Kalshi’s federal preemption argument in the long run — but the short-term cost of fighting those 23 cases, one injunction at a time, keeps rising.
FAQ
Why did the Washington court block Kalshi’s sports prediction markets?
Judge John McHale ruled that Kalshi offers illegal gambling activities under Washington state law, finding that the harm to consumers and the public interest from continued operation outweighed any harm to Kalshi from being blocked.
What is the central legal dispute involving Kalshi’s sports event contracts?
The core question is whether Kalshi’s sports event contracts are governed exclusively by federal law under the Commodity Exchange Act — which would shield them from state regulation — or whether state gambling laws apply. Courts at the preliminary injunction stage have largely sided with states so far.
How has Kalshi responded to state gambling law enforcement actions?
Kalshi argues that states lack jurisdiction to regulate prediction markets and has cited court precedents, including a ruling from the Third Circuit, in support of federal preemption. The company has called state enforcement actions a waste of taxpayer dollars driven by incumbent gambling industry interests.
What implications do the recent legal rulings have for Kalshi?
Kalshi now faces sports contract bans or pending injunctions in Nevada, Michigan, Washington, and New York. With states winning 19 of 23 preliminary decisions, the company’s sports market access is narrowing while the broader legal question awaits potential Supreme Court review.
Article produced with the assistance of artificial intelligence and reviewed by the editorial team.
