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# Oneida Nation of Wisconsin
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**Type:** Federally recognized tribe
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**Gaming:** Class III gaming compact with Wisconsin
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**Legal Status:** Sovereign nation with IGRA-protected gaming exclusivity
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## Overview
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The Oneida Nation of Wisconsin is a federally recognized tribe with Class III gaming compact granting exclusivity over specific gaming activities in Wisconsin under the Indian Gaming Regulatory Act (IGRA).
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## Prediction Market Litigation
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On April 25, 2026, the Oneida Nation became the first tribal gaming entity to join as co-plaintiff (not just amicus) in state prediction market enforcement action. Joined Wisconsin Attorney General Josh Kaul in lawsuit against Kalshi, Polymarket, Robinhood, Coinbase, and Crypto.com.
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### Legal Theory
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Prediction markets offering sports event contracts allegedly infringe on Class III gaming compact exclusivity protected under IGRA. This creates federal law enforcement pathway independent of state gambling classification arguments.
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## Timeline
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- **2026-04-25** — Joined as co-plaintiff in Wisconsin AG prediction market enforcement action |