It's not much to ask for .She should do the DNA thing. If she doesn't have the native backgroud, just do a mea culpa and apologize. If she has some native ancestry, she can tell all her detractors to **** off.
Unless she lied.
All she has to do is take the DNA test.
The people who voted for her deserve to know.
Affirmative action scholarships she got from Harvard is a federal crime if she lied in her application to the school.