Whether Article 12 of the treaty prevented Congress from disposing of tribal reservation land without the consent of three-fourths of the adult male Indians.
Holding
No. Congress retained plenary authority to regulate tribal relations and dispose of tribal property, even when its action conflicted with an earlier Indian treaty.
Reasoning
The Court rejected the premise that the treaty's three-fourths-consent provision placed tribal lands beyond Congress's authority. The tribes remained dependent wards of the United States, and their relationship to the federal government meant that Congress retained controlling authority over their care and protection.
Earlier descriptions of Indian occupancy rights as “sacred” did not resolve this dispute. Those cases concerned Indian rights against states or private parties, not the scope of Congress's authority, as guardian, over tribal property.
Congress had historically exercised plenary power over Indian affairs. The Court treated that power as political rather than judicial, and held that it included the power to abrogate or modify Indian treaty provisions when Congress judged such action necessary as a matter of governmental policy.
The Court relied on decisions such as United States v. Kagama and Cherokee Nation v. Hitchcock, which recognized Congress's broad administrative authority over dependent tribes and their property. The 1900 legislation was therefore a valid exercise of congressional power over tribal assets, which the Court characterized as a change in the form of investment of property held for the benefit of the government's wards.