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New Jersey Attorney General Jennifer Davenport filed a 332-page petition for a writ of certiorari at the U.S. Supreme Court on Wednesday, asking the justices to overturn a Third Circuit ruling that sided with prediction-market platform Kalshi in the closely watched fight over who regulates sports-betting contracts. The petition escalates a year-long legal battle that began when New Jersey sent Kalshi a cease-and-desist letter alleging the platform was running an unlicensed sportsbook under state gambling law. Kalshi countersued, arguing it operates a CFTC-regulated derivatives exchange that is beyond the reach of state gaming regulators.
Why it matters
The petition lands in the middle of an open turf war between the CFTC and state gaming regulators over the future of event-contract trading. Under CFTC Chair Michael Selig, the agency has sued multiple states and proposed a dedicated regulatory framework for prediction markets, asserting exclusive federal jurisdiction over the contracts. State officials counter that sports-event contracts are functionally sportsbooks, and that the CFTC is overreaching by recategorizing wagers on NFL games as derivatives. The justices do not have to take the case, but if they grant cert the eventual ruling will settle the preemption question that has produced contradictory rulings across the circuits.
Market impact
Kalshi's spokesperson pushed back hard on New Jersey's filing, calling the platform "an open, nationwide financial exchange" that "cannot be regulated by 50 different regulators." The company absorbed a related setback last week when a federal appeals court backed a lower-court ruling that Kalshi failed to show CFTC preemption of Nevada's sports-betting authority, a parallel decision that strengthens the state-side position. For prediction-market operators and their venture backers, the cert petition extends a regulatory limbo that has frozen new sports-event product launches in several states and pushed compliance budgets sharply higher.
Frequently asked questions
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What did New Jersey ask the Supreme Court to do in the Kalshi case?
New Jersey Attorney General Jennifer Davenport filed a 332-page petition for a writ of certiorari on Wednesday, asking the justices to review and overturn a Third Circuit ruling that sided with Kalshi in the dispute over sports-betting regulation.
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Why is New Jersey suing Kalshi?
New Jersey sent Kalshi a cease-and-desist letter last year alleging the platform was operating an unlicensed sportsbook in violation of state gambling law. Kalshi countersued, arguing it runs a CFTC-regulated derivatives exchange beyond state reach.
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What did the Third Circuit decide?
The U.S. Court of Appeals for the Third Circuit ruled in Kalshi's favor, siding with the platform's argument that federal derivatives law preempts New Jersey's attempt to regulate its sports-event contracts as gambling.
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What is the CFTC's role in this fight?
Under Chair Michael Selig, the CFTC has asserted exclusive federal jurisdiction over prediction-market event contracts, sued multiple states, and proposed a dedicated regulatory framework for the sector.
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What happens next in the Kalshi case?
The justices will decide whether to grant cert and hear the dispute. If granted, the eventual ruling will settle whether CFTC oversight of event contracts preempts state sports-betting law. Watch for a call for the views of the Solicitor General.
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