By Graham Lee Brewer NORMAN, Okla. (AP) — Three tribal nations and five Native American students filed a lawsuit Friday against the Trump administration, accusing it of failing its legal obligations to tribes when it cut jobs at Bureau of Indian Education schools last month. Firings at two colleges as part of the administration’s cuts to federal agencies, with the help of Elon Musk, have left students and staff with unsafe conditions, cancelled classes, and delayed financial aid, according to the lawsuit. Lawyers at the Native American Rights Fund filed the suit against the heads of the Interior Department, the Bureau of Indian Affairs and the Office of Indian Education Programs on behalf of the Pueblo of Isleta, the Prairie Band Potawatomi Nation, and the Cheyenne and Arapaho Tribes. The…