Washington state has won a preliminary injunction forcing Kalshi to prevent residents from buying most of its event contracts, with a judge ruling that the Commodity Exchange Act does not preempt state gambling law and that the state is likely to succeed under three laws. King County Superior Court Judge John McHale barred contracts tied to sports, elections, politics, entertainment, culture, tech and science, and markets based on whether public figures mention specific words, while allowing contracts linked to commodities, climate, economics and finance. The amended order, signed Wednesday, requires IP-address and residency-based geofencing by Aug. 19 and a GeoComply multi-source system by Sept. 2; it also lets users close existing positions in restricted categories and bars advertising of those markets in Washington. The Washington Court of Appeals denied Kalshi's request to stay the injunction, though the company continues to argue that the Commodity Futures Trading Commission has exclusive jurisdiction over its exchange.