Back to the OP, it seems the very definition of a nothingburger. I mean, I see two potential outcomes:
1) It shows some "acceptable" percentage of native american DNA that shows that she really is of the minority status that has allowed her special benefits throughout life, and allows for her to continue taking the "high road" in bashing those who want to curtail immigration and the like. Status quo.
2) It doesn't show some "acceptable" percentage of native american DNA,
@tlongII is right on the money and
no one will change their opinions of her one way or the other. Status quo.