Polymarket Sues Massachusetts, Citing CFTC Preemption After Judge Bars Kalshi Sports Markets

Judge's gavel and legal papers beside a blurred market screen, illustrating federal-state clash over prediction markets.

Polymarket escalated its fight with state regulators by filing a federal lawsuit on February 9, 2026 in the U.S. District Court for the District of Massachusetts. The company is seeking to block state-level enforcement after a Massachusetts judge ordered rival Kalshi to stop offering sports-event contracts in the state, setting up a high-stakes conflict between […]