Looking to limit birthright citizenship, Trump turns to an 1884 Supreme Court ruling against a Native American man

[Ms. Toad]

21. This case in an interpretation that is consistent with how the provision has always been interpreted.

Indians born within the territorial limits of the United States, members of and owing immediate allegiance to one of the Indiana tribes (an alien though dependent power), although in a geographical sense born in the United States, are no more "born in the United States and subject to the jurisdiction thereof," within the meaning of the first section of the Fourteenth Amendment, than the children of subjects of any foreign government born within the domain of that government, or the children born within the United States of ambassadors or other public ministers of foreign nations.

In other words, tribal nations are foreign governments. Prior to the Snyder Act, the nation's territory was a domain of that (foreign) government.

This case doesn't help them.