The Commodity Futures Trading Commission (CFTC), the federal derivatives regulator, filed a lawsuit against the Commonwealth of Kentucky on June 23, 2026, becoming the ninth state the agency sues in an accelerating battle over who can regulate prediction markets in the United States.
Kentucky had moved the previous week to shut down Polymarket, Kalshi, Coinbase, Robinhood and Webull, calling them unlicensed gambling operators, and then slap them with a 14.25% excise tax designed, the CFTC argues, to make the business economically impossible in the state.
This new wave of prediction market regulation news comes as Mark Zuckerberg gave the green light to Meta Arena, a Meta prediction market platform, reportedly making it a priority for the company’s developers.
EXCLUSIVE: The CFTC is suing its ninth state, Kentucky, in its escalating fight over sporting event contracts, FOS has learned.
The move follows last week’s lawsuits by Kentucky’s attorney general against Kalshi and Polymarket.
— Reception Sports (@FOS) June 23, 2026
What Kentucky Did and Why the CFTC Acted Quickly
Kentucky Attorney General Russell Coleman filed three state lawsuits between June 17 and June 18, 2026, targeting Kalshi and Polymarket along with their distribution partners.
The state argued that sporting event contracts, negotiable instruments tied to real-world outcomes, “fall squarely within the definition of ‘sports betting’ under Kentucky law,” according to the state’s own documents.
Sports betting has been under the jurisdiction of the Kentucky Horse Racing and Gaming Corporation since 2023, and Coleman’s office alleged that the platforms operated without a Kentucky gaming license and offered users “little or no resources” to identify or seek help for a gambling problem, as required by state law.
The CFTC’s federal lawsuit names Governor Andrew Beshear, Attorney General Coleman, Department of Revenue Commissioner Thomas Miller and the Kentucky Racing and Gaming Corporation as defendants.
It seeks declaratory and injunctive relief, meaning the CFTC wants an injunction blocking Kentucky’s lawsuits and taxes from taking effect while the legal question of jurisdiction is resolved.
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The tax that sparked an argument between McCulloch and Maryland
Kentucky House Bill 757, passed on 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.
The CFTC’s lawsuit calls it the first state tax of its kind on prediction markets in the country and invokes Chief Justice Marshall’s line in McCulloch v. Maryland: “the power to tax implies the power to destroy.”
The argument is compelling: this is not a legitimate fiscal policy; It is a mechanism to drive federally regulated markets out of the state. “This tax essentially makes it impossible for prediction markets to operate in Kentucky,” the CFTC argued in its complaint, according to agency press release.
The Coalition for Fair Markets, a group representing Kalshi, Polymarket, Crypto.com, and Robinhood, filed its own parallel lawsuit in Franklin Circuit Court around June 12, calling the tax “discriminatory, unconstitutional, and preempted by federal law.”
ICYMI: The @CFTC has sued Kentucky, accusing the state of illegally targeting federally regulated prediction markets.
Regulator says Kentucky’s enforcement actions, penalties and new transaction fees on CFTC-registered exchanges violate federal law and interfere with… pic.twitter.com/2F9hMdkk3S
– The Crypto Times (@CryptoTimes_io) June 24, 2026
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Federal preemption is the central legal claim
The CFTC’s legal theory is based on the Commodity Exchange Act (CEA), which regulates derivatives markets. Kalshi and Polymarket are designated contract markets with federal exchange licenses, and classify 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 prevails over conflicting state law when Congress grants exclusive authority to a federal agency.
CFTC Chairman Mike Selig emphasized this, noting that Kentucky is attempting to restrict federally regulated event contracts and the CFTC is committed to maintaining its jurisdiction over prediction markets.
A recent ruling in Tennessee supports the CFTC’s position: A U.S. district court granted Kalshi a preliminary injunction, finding that its products are likely legal exchanges under the CEA and that federal law prevails over state action.
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