A Massachusetts judge has issued a preliminary injunction against prediction markets platform Kalshi, preventing it from offering sports betting services in the state. The decision, made by Suffolk County Superior Court Judge Christopher Barry-Smith, follows a lawsuit filed by Massachusetts Attorney General Andrea Joy Campbell. The lawsuit, initiated in September, accused Kalshi of providing illegal and unsafe sports wagering without the necessary gaming license. The injunction was granted at Campbell's request, highlighting regulatory challenges for Kalshi in Massachusetts.