New Jersey attorney general petitions Supreme Court on Kalshi sports event contracts
New Jersey Attorney General Jennifer Davenport filed a petition Wednesday asking the Supreme Court to hear arguments on whether Kalshi's sports event contracts are illegal gambling or CFTC-regulated swaps. The filing marks the first time the legality of prediction markets has reached the high court. The petition lands amid an ongoing circuit split over whether federal commodities oversight preempts state gaming laws.
The Supreme Court petition puts Kalshi and Polymarket's national model at direct risk. Both platforms rely on CFTC registration as a one-stop shield against 50 state gambling regimes; a ruling that limits preemption would force state-by-state licensing or geofencing instead. The Ninth Circuit's recent Nevada ruling against Kalshi created the circuit split that makes Supreme Court review more likely.
Each state win emboldens the next attorney general to file, compounding legal spend while the map of legal operation shrinks. Traders hold sports-linked positions whose validity could shift with geography, not regulation. A grant of certiorari would freeze the preemption question for months or years, and any final ruling that sides with states would fragment the prediction-markets landscape before it matures.
New Jersey joins Nevada, Connecticut, and Baltimore in challenging the preemption shield that CFTC-registered exchanges have relied on to operate nationwide.