Four New Mexico tribes filed a federal lawsuit against Kalshi in U.S. District Court in Albuquerque on Tuesday, May 13, 2026, arguing that the prediction market platform is conducting illegal sports betting on tribal lands in violation of the Indian Gaming Regulatory Act. The Mescalero Apache Tribe, the Pueblo of Isleta, the Pueblo of Pojoaque, and the Pueblo of Sandia are the plaintiffs. The case is the third IGRA-based lawsuit filed against Kalshi by tribal gaming operators, following prior suits in California and Wisconsin.
The timing of the New Mexico filing follows a significant development in Wisconsin, where a federal judge on May 11 ruled that the Ho-Chunk Nation can move forward with its IGRA claim against Kalshi, finding the tribe had shown a likelihood of success on the merits. That preliminary ruling, which falls short of a final decision but affirms the tribe’s legal argument at the threshold stage, was described by gaming attorneys as potentially opening the floodgates for further tribal litigation.
The New Mexico tribes argue that Kalshi’s sports event contracts — covering game outcomes, point spreads, totals, player props, and parlays — are functionally identical to the sports betting products regulated under IGRA at tribal casinos. Under New Mexico law and the applicable gaming compacts, in-person sports wagering at tribal facilities is the only legal form of sports betting in the state, and only for patrons 21 and older. Kalshi allows users 18 and up to access the same types of sports contracts from anywhere, including on tribal land.
Critically, the tribes reject the industry argument that Kalshi operates as a peer-to-peer trading platform rather than a house-based sportsbook. The complaint states that under IGRA, whether an activity constitutes gaming does not depend on whether players bet against a house. The legal framework focuses on the nature of the activity itself, not the mechanics of how odds or risk are structured on the back end.
Residents interested in New Mexico sports betting have limited regulated options — the state has tribal gaming operations but no mobile sportsbooks or online casino products beyond tribal facilities. Prediction markets like Kalshi have filled some of that void for sports fans in the state, but the lawsuit now puts that access in legal jeopardy. If the court grants an injunction before ruling on the merits, Kalshi could be required to restrict access within tribal boundaries — or potentially statewide — while the case proceeds. DraftKings, FanDuel, and other major sportsbook operators do not currently offer legal online sports betting to New Mexico residents.
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