One-drop Rule
The one-drop rule is a social and legal principle of racial classification that was historically prominent in the United States asserting that any person with even one ancestor of sub-Saharan African ancestry (”one drop” of black blood)[1][2] is considered black (Negro in historical terms), its implications of racial purity being that anyone unable to pass for white in the context of the US racial hierarchy is assigned the lower status of being non-white or colored.
This concept evolved over the course of the 19th century and became codified into the law of some states in the early 20th century. It was associated with the principle of “invisible blackness” and is an example of hypodescent, the automatic assignment of children of a mixed union between different socioeconomic or ethnic groups to the group with the lower status.[3]......
https://en.wikipedia.org/wiki/One-drop_rule
Related::
Elizabeth Warren Positions Herself as the Front-Runner
The Democratic senator’s DNA test wasn’t a mere rebuttal of Trump. It also shows she’s a presidential contender.
It is a sad day for the Republic and for the truth when a prominent member of the (D) party invokes a rule that was originally designed to segregate, suppress and enslave people in order to advance her appeal as a candidate for President. What does this say for the people, especially for those in the media, who cheer her announcement of a DNA test?
https://en.wikipedia.org/wiki/Blood_quantum_laws
Tribes vary in their requirements, some require 1/2, 1/4, 1/8 or 1/16th.
Some tribes like the Cherokee Nation, require documented proof of descent.