Here are the materials filed in Mashpee Wampanoag Tribe v. Zinke (D.D.C.):
HuffPo. [with link to Trump’s bigoted testimony against the tribe in 1993]
Here is the opinion in Cherokee Nation v. Bernhardt (N.D. Okla.):
Prior post here.
Here is the complaint in Eastern Band of Cherokee Indians v. Dept. of the Interior (D.D.C.):
And here is the Interior decision:
Here is the unpublished opinion in Jackson v. United States.
Lower court materials here.
Here is M-37055 (pdf), withdrawing M-37029.
Here is the opinion in Sault Ste. Marie Tribe of Chippewa Indians v. Bernhardt (D.D.C.):
Case tag here.