Michigan judge denies Coinbase bid to block state enforcement of sports event contracts
U.S. District Judge Shalina Kumar denied Coinbase's bid to block Michigan state enforcement of sports event contracts in an Aug. 6 ruling, calling the company's preemption arguments 'applesauce.' The denial leaves Coinbase without an injunction as its legal challenge continues. State regulators may now proceed with enforcement actions targeting the exchange's planned sports-linked event contracts. The ruling came in Coinbase's lawsuit against Michigan authorities over prediction-market-style sports products.
Coinbase now faces enforcement risk in Michigan while its sports event-contract case proceeds to full trial. The ruling strips away the federal preemption shield Coinbase had argued its regulatory framework provides, forcing it to defend on state gambling law grounds instead. Traders considering Coinbase's prediction products face sudden contract voiding if Michigan acts before the case concludes.
The loss mirrors Kalshi's parallel setbacks in Wisconsin, Utah, and New York, where CFTC registration proved equally ineffective against state gambling enforcement. Each new state defeat multiplies litigation costs and shrinks the addressable market for federally registered platforms. Coinbase must now geofence Michigan or absorb penalties while fighting market by market. Polymarket holds identical CFTC registration and faces identical exposure in every state that copies Michigan's playbook.
Joins Utah, Wisconsin, and Washington in rejecting federal preemption defenses by CFTC-registered prediction market platforms, deepening the geographic patchwork where state gambling law overrides federal registration.