What does “tribal sovereignty” mean and why is it so important to American Indians?’

Tribal sovereignty describes the right of federally recognized tribes to govern themselves and the existence of a government-to-government relationship with the United States. Thus a tribe is described as dependent nations with the right to form its own government, adjudicate legal cases within its borders, levy taxes within its borders, establish its membership, and decide its own future fate. The federal government has a trust responsibility to protect tribal lands, assets, resources and treaty rights.