Blackfeet Nation

also known as "Blackfeet"

Blackfeet Nation

“The Blackfeet Indian Reservation is home to the 17,321-member Blackfeet Nation, one of the 10 largest tribes in the United States. Established by treaty in 1855, the reservation is located in northwest Montana.” Source: Tribal website

Article 6 of the U.S. Constitution (the Supremacy Clause)

“This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.”