A federal judge in Wisconsin is allowing the Ho-Chunk Nation to continue pursuing its central claims against prediction market operator Kalshi, keeping alive a closely watched fight over whether sports event contracts amount to illegal betting on tribal lands. In Monday’s ruling (May 11), U.S. District Judge William Conley said the lawsuit “principally concerns the ability of plaintiff Ho-Chunk Nation, a federally-recognized Indian tribe, to prohibit online sports betting from occurring on its tribal land.” The dispute focuses on Kalshi’s online event contracts, which let users trade on sports outcomes and other real-world events through a market regulated by the Commodity Futures Trading Commission. Robinhood has partnered with Kalshi to distribute some of those contracts through its own platform.…