The Commodity Futures Trading Commission filed suit against Kentucky on June 23, escalating a mounting legal fight over who gets to police prediction markets in the US. At the center of the case are Kentucky’s recent moves against Kalshi, Polymarket, and related firms over sports-linked event contracts that the state argues amount to illegal gambling under state law, alongside a proposed 14.25% excise tax on prediction-market activity. The CFTC says Kentucky is trying to shut down federally regulated event contracts using state law, and argues that products traded on CFTC-supervised markets fall under exclusive federal jurisdiction.
What’s at stake isn’t merely a set of tax rules or local bans. The core question is whether prediction markets are subject to a uniform federal framework as financial contracts, or whether states can carve their own path and treat them as gambling. The CFTC calls Kentucky’s moves an attempt to “banish” prediction markets altogether, warning that if states can override federal oversight, operators and users could face a patchwork of conflicting rules nationwide. Kentucky, on the other hand, maintains that federal law doesn’t automatically override state gambling restrictions, especially for sports. The next major step is the court’s ruling on whether Kentucky’s actions conflict with federal law. That will help set the boundary for who truly governs prediction markets going forward.