The Commodity Futures Trading Commission (CFTC) filed a lawsuit against the Commonwealth of Kentucky on June 24, 2026, marking the ninth state the agency has sued in an escalating battle over prediction market regulation. According to reports from ChainThink and The Block, the CFTC alleges that Kentucky attempted to shut down federally regulated designated contract markets and interfered with the federal government's exclusive authority over nationwide swap markets. Kentucky had moved the prior week to shut down Polymarket, Kalshi, Coinbase, Robinhood, and Webull, calling them unlicensed gambling operators. The CFTC's federal complaint names Governor Andrew Beshear, Attorney General Russell Coleman, Department of Revenue Commissioner Thomas Miller, and the Kentucky Racing and Gaming Corporation as defendants, seeking declaratory and injunctive relief to block Kentucky's enforcement actions. CFTC Chair Mike Selig stated that Kentucky is the latest state attempting to shut down federally-regulated event contracts, describing the case as another step to protect federal interests and maintain the commission's exclusive jurisdiction over prediction markets. As reported by CNBC, this marks the first time the CFTC has taken legal action against a state with a Republican attorney general under the Trump administration, with all previous eight lawsuits targeting states whose attorneys general were Democrats.
Kentucky Attorney General Russell Coleman, a Republican, filed three state lawsuits around June 17–18, 2026, targeting Kalshi and Polymarket alongside their distribution partners. As reported by ChainThink and The Block, the state argued that sports event contracts, tradeable instruments tied to real-world outcomes, "fall squarely within the definition of 'sports wagering' under Kentucky law." Kentucky's House Bill 757, passed April 14, 2026, amends the state tax code to impose a 14.25% excise tax on prediction market transaction fees, mirroring the rate applied to online sportsbooks. According to Front Office Sports, the bill specifically states that "on and after January 1, 2027, an excise tax is hereby imposed on a prediction market operator at the rate of fourteen and one-quarter percent (14.25%) of the prediction market operator's transaction fees." The CFTC argues this represents the first such state tax on prediction markets in the country and invokes Chief Justice Marshall's line from McCulloch v. Maryland: "the power to tax involves the power to destroy." The agency states that this tax essentially makes it impossible for prediction markets to operate in Kentucky.
The CFTC's legal argument is based on the Commodity Exchange Act (CEA), which regulates derivatives markets. According to the agency's press release, Kalshi and Polymarket are designated contract markets with federal exchange licenses, classifying their event contracts as "swaps." Coinbase, Robinhood, and Webull are registered futures commission merchants, allowing them to offer event contracts in collaboration with licensed exchanges. Federal preemption dictates that federal law preempts conflicting state law when Congress grants exclusive authority to a federal agency. A recent ruling in Tennessee supports the CFTC's position, with a US District Court granting Kalshi a preliminary injunction, finding that its products are likely legal swaps under the CEA and that federal law preempts state action. As reported by The Hill, the CFTC moved against Rhode Island in May after that state's attorney general sued Kalshi and Polymarket for alleged violations of state sports-betting statutes, and the agency has pursued a similar pattern of filing suit shortly after state enforcement actions. Chairman Michael S. Selig framed the suit as part of a broader defense of the agency's exclusive jurisdiction, stating that "Kentucky is the latest state attempting to shut down federally-regulated event contracts... the CFTC is firmly committed to maintaining its exclusive jurisdiction over prediction markets."
The Coalition for Fair Markets, representing Kalshi, Polymarket, Crypto.com, and Robinhood, filed its own parallel suit in Franklin Circuit Court around June 12, calling the tax "discriminatory, unconstitutional, and preempted by federal law." As reported by The Crypto Times, the CFTC argues that "this tax essentially makes it impossible for prediction markets to operate in Kentucky." This regulatory dispute comes as Mark Zuckerberg has greenlit Meta Arena, a prediction market platform from Meta, reportedly making it a priority for the firm's developers. The filing follows a broader campaign by the CFTC since Selig's appointment in December, with Kentucky becoming the ninth state sued by the regulator over state action targeting prediction markets. According to CNBC, since April 2, the CFTC has now brought suits against a total of nine states: Arizona, Connecticut, Illinois, New York, Wisconsin, Minnesota, Rhode Island, New Mexico, and Kentucky. The dispute adds to a widening clash between state gaming enforcement and federal commodities oversight as prediction markets expand into sports-related contracts and attract growing political and industry attention.
