Case: 3:25-cv-00698-wmc Document #: 56-1 Filed: 01/06/26 Page 1 of 13
UNITED STATES DISTRICT COURT FOR THE WESTERN DISTRICT OF WISCONSIN
HO-CHUNK NATION,
Plaintiff,
Case No. 3:25-cv-00698
v. KALSHI INC., KALSHIEX LLC, ROBINHOOD MARKETS, INC., ROBINHOOD DERIVATIVES LLC, AND DOES 1-20, Defendants.
BRIEF OF INDIAN GAMING ASSOCIATION, NATIONAL CONGRESS OF AMERICAN INDIANS, WASHINGTON INDIAN GAMING ASSOCIATION, CALIFORNIA NATIONS INDIAN GAMING ASSOCIATION, ARIZONA INDIAN GAMING ASSOCIATION, OKLAHOMA INDIAN GAMING ASSOCIATION, NATIVE AMERICAN FINANCE OFFICERS ASSOCIATION, AND 16 FEDERALLY RECOGNIZED INDIAN TRIBES AS AMICI CURIAE IN SUPPORT OF PLAINTIFF’S MOTION FOR PRELIMINARY INJUNCTION The Indian Gaming Association (“IGA”), National Congress of American Indians (“NCAI”), Washington Indian Gaming Association (“WIGA”), California Nations Indian Gaming Association (“CNIGA”), Arizona Indian Gaming Association (“AIGA”), Oklahoma Indian Gaming Association (“OIGA”), Native American Finance Officers Association (“NAFOA”), and 16 federally recognized Indian Tribes (“Amici Tribes”) 1 (collectively, “Tribal 1 The Amici Tribes include: Agua Caliente Band of Cahuilla Indians; Elk Valley Rancheria; Jamul Indian Village of California; Karuk Tribe; Kickapoo Traditional Tribe of Texas; Lytton Rancheria; Mashantucket Pequot Tribal Nation; Mescalero Apache Tribe; Morongo Band of Mission Indians; Pechanga Band of Indians; Picayune Rancheria of Chukchansi Indians of California; Pokagon Band of Potawatomi Indians; Pueblo of Sandia; Seminole Tribe of Florida; Sycuan Band of Kumeyaay Nation; and Tunica-Biloxi Indian Tribe.
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