I suspect she already did, and the answer was that she does not have even a smidgeon of Native American DNA. So she does not want to publicize that. Her desire to cast aspersions on anyone trying to scientifically determine if those kids are really related to those calling them parents makes sense in this context--to her, just claiming something is good enough.
I suspect that she is aware that many (most?) of these kids are victims of human trafficking, and does not care. After all, the Democrats are the slave party.
Youre probably right!