Ohio threatens prediction market lawsuits as Polymarket sues first

• —Ohio sent notices to 10 firms, including Coinbase, Robinhood and Polymarket, setting an Oct. 16 deadline
• —Polymarket argues Ohio's licensing rules violate the Commerce Clause and are preempted by the CEA
• —The Sixth Circuit on Sept. 25 upheld denial of Kalshi's preliminary injunction
• —Kalshi sought panel and en banc rehearing on Oct. 9, citing new CFTC rulemaking