Prediction market platform Kalshi is confronting a mounting legal assault from state authorities, with Washington State becoming the latest jurisdiction to file a lawsuit alleging the company operates an illegal gambling enterprise. The complaint, filed by Washington Attorney General Nick Brown, asserts that Kalshi’s event contracts—which allow users to wager on outcomes ranging from political elections to economic indicators—directly violate the state’s stringent gambling laws and consumer protection statutes.
Washington Joins Multi-State Legal Offensive
The Washington lawsuit, submitted to the King County Superior Court, accuses Kalshi of violating the state’s Gambling Act, the Consumer Protection Act, and the Recovery of Money Lost at Gambling Act. The core of the AG’s argument hinges on Washington’s legal definition of gambling as “staking or risking something of value upon the outcome of a contest of chance or a future contingent event.”
“Kalshi’s website and app show consumers a range of events that they can bet on and the odds for those various events, which dictate how much the bettor will be paid out if the event occurs,” the AG’s office stated. “This is exactly how sportsbooks and other gambling operations function. Kalshi advertises that they allow consumers to ‘bet on anything’ by simply calling their service a ‘prediction market’ rather than ‘gambling.’” The filing emphasizes that each Kalshi contract involves a monetary risk, an element of chance, and a promised payout—aligning squarely with Washington’s statutory definition.
Kalshi’s Federal Jurisdiction Defense and Procedural Move
In a swift procedural response, Kalshi filed a notice of removal to move the case from state to federal court. The company’s filing argues that the issues are already under consideration in other federal courts and criticizes Washington for initiating litigation without prior warning or regulatory dialogue. Kalshi’s central legal thesis, repeated across multiple jurisdictions, is that its event contracts are “commodity contracts” under the exclusive oversight of the U.S. Commodity Futures Trading Commission (CFTC), a federal agency that has granted it a no-action letter.
A Pattern of State-Level Enforcement Actions
The Washington suit is part of a coordinated wave of state-level actions that pose a significant regulatory threat to Kalshi’s business model.
Nevada Issues Temporary Ban
Earlier in the same week, a Nevada judge granted a temporary restraining order (TRO) blocking Kalshi from operating in the state. Carson City District Court Judge Jason Woodbury sided with the Nevada Gaming Control Board, finding that state regulators are “reasonably likely to prevail” on the merits of their case that Kalshi’s products constitute unlicensed gambling. The 14-day TRO halts Kalshi’s services for Nevada residents pending a full hearing.
Arizona Files Criminal Charges
Arizona has taken the most aggressive step, with Attorney General Kris Mayes announcing criminal charges against the entities behind Kalshi. The charges allege the operation of an “illegal gambling business in Arizona without a license” and specifically cite the offering of illegal election wagering. Unlike civil suits in Washington and Nevada, the Arizona case introduces the possibility of criminal penalties, signaling a heightened enforcement posture from at least one state.
The Federal vs. State Jurisdiction Clash
Kalshi’s defense consistently rests on the premise that the CFTC’s regulatory framework preempts state gambling laws for its listed contracts. The company points to the CFTC’s historical tolerance for regulated prediction markets and its own no-action letter as evidence of federal sanction. State regulators, however, argue that gambling law is a traditional area of state police power and that Kalshi’s retail-facing, odds-based wagering products are indistinguishable from sports betting, which is heavily restricted or illegal in most states.
This conflict sets the stage for a potential Supreme Court review, as multiple state court decisions could create a circuit split on whether the CFTC’s jurisdiction displaces state gambling regulations for prediction market contracts offered to the general public.
Broader Scrutiny Beyond Traditional Gambling
The legal battles are unfolding as prediction markets attract scrutiny from federal lawmakers over contracts tied to U.S. military actions and geopolitical events. Concerns about potential insider trading by government officials with advance knowledge of such events have prompted calls for a legislative crackdown, adding another layer of reputational and regulatory risk for platforms like Kalshi.
These concurrent state lawsuits, spanning from the Pacific Northwest to the Southwest, represent the most serious challenge yet to the legal viability of mainstream prediction markets in the United States. The outcomes will determine whether Kalshi’s model of “betting on
