A Washington Court Enjoins Kalshi Over State Gambling Law

A Washington state judge granted the state attorney general a preliminary injunction against KalshiEX on Monday, barring the exchange from offering several categories of event contracts to residents of the state. King County Superior Court Judge John McHale held that "the Commodity Exchange Act does not prevent Washington from applying its gambling laws to Kalshi," notwithstanding the company's federal registration with the Commodity Futures Trading Commission. A preliminary injunction is interim relief issued before a case is decided, meant to hold a position in place while the litigation runs its course. The order is scheduled to take effect on 5 August after further submissions from the parties due 3 August, according to the attorney general's office. The significance is jurisdictional: a state gambling statute has been applied to a venue operating under a federal registration.

The Order: Seven Contract Categories, Washington Residents Only

The injunction bars Kalshi from offering contracts on sports, elections, politics, entertainment, culture, tech and science, or mentions to Washington residents. It works at the level of categories rather than individual markets, so it does not turn on the wording of any one contract. Its reach is territorial: nothing is cancelled or voided elsewhere, and what stops is the act of offering those contracts to people in Washington. The attorney general's office announced the outcome the day it was granted, and crypto.news and Gambling Insider described the same scope.

Preemption: The Doctrine the Court Declined to Apply

Preemption is the principle that where Congress has legislated in a field, a conflicting state law gives way to the federal one. Applied here, the argument would run that because Kalshi is registered with the CFTC and its contracts are federally regulated instruments, a state may not separately treat those same contracts as gambling. Judge McHale's holding rejects that reading for now, finding that the Commodity Exchange Act does not stop Washington from applying its own gambling laws to the exchange. Because the relief is preliminary, the finding is provisional: such an order rests on a court's view of the strength of a case and the harm of waiting, not on a final judgment on the merits.

The ruling came three days after France's gambling regulator, the Autorité nationale des jeux, ordered internet providers to block access to Polymarket outright, an escalation from its earlier restriction on French payments to the site. The two actions arise under different bodies of law and neither binds the other. What they share is a premise — that a licensing regime for gambling can reach an event-contract venue that does not describe itself as a gambling operator.

Why It Matters for a CFTC-Registered Venue: One Rulebook or Fifty

A federally registered exchange normally lists one catalogue of contracts for the whole country and answers to one regulator for it. If state gambling law applies on top of that registration, the compliance boundary moves from the product to the customer: the same contract may be permissible for one user and prohibited for another depending on where that user lives, and the venue has to determine which is which. The order says nothing about how other jurisdictions will read the Commodity Exchange Act, but it gives them a decision to point at. Prediction markets have drawn attention this year for reasons unconnected to licensing, among them a supply-chain attack on Polymarket's website that drained $3.1 million from user wallets in June. The regulatory question is separate and older: whether contracts that pay out on real-world outcomes are derivatives, wagers, or both.

What Is Unresolved: An August Date and a Provisional Holding

Submissions are due on 3 August and the order is scheduled to take effect two days later, leaving a defined window in which the parties can be heard on scope and implementation before anything binds. Nothing in the ruling settles the preemption question permanently, and a preliminary injunction is by design a placeholder for a fuller determination. For other registered venues offering event contracts, the useful reading is not the list of categories but the reasoning behind it: a federal registration was treated as insufficient, on its own, to displace a state's gambling statute.