TheBlock
The Justice Department and the Commodity Futures Trading Commission sued Arkansas Attorney General Tim Griffin on Thursday, asking a federal court to block the state's enforcement action against prediction market platform Kalshi. Filed in the U.S. District Court for the Eastern District of Arkansas, the lawsuit argues the Commodity Exchange Act gives the CFTC exclusive jurisdiction over commodity futures, options, and swaps on regulated platforms, and that the event contracts Arkansas targets are swaps under the CEA. The federal agencies say the state's effort to stop a CFTC-regulated platform from offering those products intrudes on the exclusive federal scheme, and they are seeking preliminary and permanent injunctive relief.
Why it matters
The suit is the most aggressive federal intervention yet in the escalating fight over prediction markets. It follows Griffin's Nov. 4 lawsuit alleging Kalshi operated an illegal gambling platform letting users wager on the outcome of just about anything, which Griffin argued is squarely prohibited by Arkansas law. The same day, Louisiana Attorney General Liz Murrill sued companies including Kalshi, Polymarket, Robinhood, and Coinbase, seeking a restraining order and declaring they had violated state laws with impunity. A federal judge also granted a preliminary injunction last week barring Kalshi from offering sports-event contracts on the lands of two California tribes, though Kalshi says it voluntarily withdrew from those lands in September.
Market impact
If the court accepts the federal preemption argument, it would establish that CFTC regulation, not state gambling law, governs prediction market platforms, clearing the biggest legal overhang on the sector's US expansion. The DOJ and CFTC taking Kalshi's side signals federal backing for event contracts as regulated financial products rather than unlicensed wagering. Watch how other state AGs respond, and whether Louisiana's broader suit naming Robinhood and Coinbase proceeds on parallel or preempted grounds.
Frequently asked questions
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Why did the DOJ and CFTC sue Arkansas over Kalshi?
The federal agencies filed suit to block Arkansas AG Tim Griffin's enforcement action against Kalshi, arguing the Commodity Exchange Act gives the CFTC exclusive jurisdiction over event contracts and that state gambling law is preempted.
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What does the lawsuit say prediction market contracts are?
The DOJ and CFTC argue the event contracts targeted by Arkansas are swaps under the Commodity Exchange Act, making Kalshi a CFTC-regulated platform rather than an unlicensed gambling operator.
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Which other states are suing prediction market platforms?
Louisiana's attorney general filed suit the same day against Kalshi, Polymarket, Robinhood, and Coinbase, seeking an immediate restraining order and injunction against the companies.
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What relief is the federal government seeking against Arkansas?
The DOJ and CFTC are asking the U.S. District Court for the Eastern District of Arkansas to grant preliminary and permanent injunctive relief barring enforcement of the state action against Kalshi.
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Has Kalshi faced other legal setbacks recently?
Yes. A federal judge granted a preliminary injunction last week barring Kalshi from offering sports-event contracts on the lands of two California tribes, though Kalshi says it voluntarily withdrew from those lands in September.
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