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Arizona has opened a direct legal fight with Kalshi after state prosecutors accused the prediction market operator of breaking Arizona gambling law. The case landed just days after Kalshi went to federal court in an attempt to block enforcement.
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Less than a week after Kalshi sued Arizona, the state answered with a case of its own. Arizona filed its lawsuit in the Superior Court in Maricopa County on Monday, and Attorney General Kris Mayes followed with a blunt public statement a day later.
“Arizona will not be bullied into letting any company place itself above state law,” Arizona Attorney General Kris Mayes said.
According to the attorney general, KalshiEx LLC and Kalshi Trading LLC face 20 criminal misdemeanor counts for allegedly running an illegal gambling business in Arizona without a license and for offering election wagering. State officials said the activity included bets tied to professional sports, college sports, player prop style markets, and political outcomes.
That makes Arizona one of the clearest examples yet of the growing clash between state gambling law and federally regulated event contracts. Kalshi has argued in several states that its exchange falls under the Commodity Futures Trading Commission, not under state gaming regulators. Arizona is taking the opposite view and is trying to enforce state law anyway.
Sports contracts helped trigger the dispute, but election wagering gave Arizona another strong point of attack. State officials said Arizona law clearly treats election betting as criminal conduct, and the complaint names several political contracts offered on the Kalshi platform. Those include markets on the 2028 presidential race, the 2026 Arizona gubernatorial race, the 2026 Arizona Republican gubernatorial primary, and the 2026 Arizona Secretary of State race.
Attorney General Mayes also said Kalshi accepted wagers on Arizona men basketball and women basketball games, Super Bowl prop bets, and other event contracts that would normally fall inside the state sports betting system. Kalshi does not hold an Arizona sports betting license, and Arizona argued that the company does not pay the same taxes and follow the same rules that apply to licensed sportsbooks in the state.
Mayes framed the case as part of a bigger pattern.
“Kalshi is making a habit of suing states rather than following their laws. In the last three weeks alone, the company has filed lawsuits against Iowa and Utah, and now Arizona,” said Attorney General Mayes. “Rather than work within the legal frameworks that states like Arizona have established, Kalshi is running to federal court to try to avoid accountability.”
Kalshi clearly expected a state crackdown. In its earlier federal filing against Arizona, the company warned that “there is a substantial risk that the Attorney General of Arizona will bring an enforcement action against Kalshi on behalf of the Arizona Department of Gaming with the intent to prevent Kalshi from offering event contracts for trading on its federally regulated exchange.”
That prediction turned out to be right. It just did not stop Arizona.
Kalshi answered on Tuesday and said the case was retaliation for its federal suit.
“These state-court charges are seriously flawed. It’s gamesmanship.
“Four days after Kalshi filed suit in federal court, these charges were filed to circumvent federal court and short-circuit the normal judicial process. They attempt to prevent federal courts from evaluating the case based on the merits – whether Kalshi is subject to exclusive federal jurisdiction.
“These charges are meritless, and we look forward to fighting them in court.”
Arizona already has a legal sports betting market with licensed operators, so state officials have a clear structure they want companies to use. Kalshi went around that system by offering sports event contracts under federal oversight instead. That same conflict has shown up in other states, including Nevada, Massachusetts, Michigan, Iowa, and Utah, where regulators and attorneys general have challenged prediction market operators over sports contracts.
For Arizona, the complaint is also about control. State regulators are signaling that companies cannot bypass local licensing, tax rules, and betting limits by labeling wagers as event contracts. For Kalshi, the fight is about whether federal commodities law gives it cover to keep offering those markets across the country.