The U.S. Department of Justice and the Commodity Futures Trading Commission have filed a lawsuit against Arkansas to block the state from enforcing gambling regulations beyond its case against prediction market platform Kalshi. The federal agencies seek to halt Arkansas' enforcement actions and prohibit probes tied to trades conducted on CFTC-regulated exchanges. The requested injunction extends protection not only to Kalshi but also to its affiliates and partners, signaling a broader effort to shield federally regulated prediction markets from state-level interference.