Arizona Attorney General Kris Mayes has filed criminal charges against prediction market platform Kalshi, accusing the financial trading company of operating an illegal gambling enterprise within the state. The filing represents a significant escalation in regulatory scrutiny of prediction markets, which allow users to bet on outcomes ranging from elections to economic indicators.

Kalshi swiftly rejected the allegations, with company representatives characterizing the case as "based on paper-thin arguments." The platform asserts its operations fall exclusively under federal jurisdiction rather than state gambling laws, setting up what could become a landmark legal battle over the future of prediction markets in the United States.