Federal Indian policy establishes the relationship between the United States Government and the Indian Tribes within its borders. The Constitution gives the federal government primary responsibility for dealing with tribes. Some scholars divide the federal policy toward Indians in six phases: coexistence (1789–1828), removal and reservations (1829–1886), assimilation (1887–1932), reorganization (1932–1945), termination (1946–1960), and self-determination (1961–1985