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Polymarket sues Michigan officials over prediction-market enforcement

Regulation

Polymarket sued Michigan Attorney General Dana Nessel and Michigan Gaming Control Board chair Jim Ananich in federal court, seeking to block state gambling-law enforcement against sports event contracts. The company argues that federal regulation by the Commodity Futures Trading Commission pre-empts Michigan’s authority and says the state’s case against Kalshi creates an immediate threat of enforcement.

The case tests whether Michigan can apply its gambling laws to sports event contracts offered by prediction markets.

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Michigan judge denies Polymarket request to block state enforcement

US District Judge Paul L. Maloney denied Polymarket’s request for a temporary restraining order in Michigan, leaving the case to proceed without immediate relief. The judge said Polymarket had not shown an imminent threat of enforcement; its request for a preliminary injunction remains pending, and the dispute concerns whether sports event contracts fall under federal or state oversight.

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