Existed before the constitution but also extra constitutional. Existed before the united states so they existed before the constitution. Legal and social constructions that have been put in place to act as a barrier protect tribes from federal agencies. In 19th c saw the existing of indigenous people and the existing as their own communities ars problems. You have to be recognized by other sovereign nations. The united state is unique in this way. More than 350 treaties signed between the us and indigenous people. None between the british and the australian indigenous people. Based on what the federal government wanted at the moment. Treaties rest on the notion that tribes are sovereign. 1st treaty by what was come to be the us and the delaware people. Recognized that the united states needed tribal nations, Because they were tribes that buffered between the new us and the british and the french.