A federal judge in Wisconsin has allowed the Ho-Chunk Nation to move forward with a lawsuit challenging whether online sports prediction markets offered by Kalshi amount to illegal sports betting on tribal lands under the Indian Gaming Regulatory Act, according to Tribal Business News.
The Ho-Chunk Nation sued Kalshi and its partner Robinhood in August 2025, arguing the companies are running unlicensed sports betting through binary “event contracts” tied to real-world sporting events. The tribe says those contracts can be accessed by anyone physically located on its lands.
In its complaint, the Nation alleged that Kalshi’s sports contracts “amount to unlawful gaming being offered and advertised on the Nation’s tribal lands in violation of the Indian Gaming Regulatory Act.”
