Remember Hillary’s “Donald Duck” agent who crashed Trump campaign events. Disney pressured Donna Brazille stop that. This is better, only Indians have the rights to being Indians.
Anyone who wants to identify as an American Indian, is apparently not restricted by law from doing so. Even so, Indians who may be declared to be members of a tribe may only do so at the exercise of that authority by the tribe in which membership is claimed. Thus, to be a Cherokee, and acceptable as a tribal member, there must be at least 25% blood quantum relationship to an established tribal member. And here is where it gets a little troublesome, as the Eastern Band of Cherokee, based in western North Carolina, the descent may only be matrilineal, while the portion of the tribe that was force-marched to Oklahoma recognizes both matrilineal and patrilineal descent, a problem that the separate locations have not resolved.
So at best, Elizabeth Warren is only a very dilute cross breed, which historically have been little respected by the members of either of the ancestoral families. But of course, with the liberated attitudes of today, nobody believes that any longer.