Some of y'all are so far in the political bubble you got no clue what happens outside it.
My local news (two different channels) covered Sen. Warren's statement and video today. The framing was "Trump said this about her, used a slur against her. Sen. Warren had said she had native american ancestry, and her test today prove it" followed by Trump saying "who cares." No one gives two shits about what people who call her Pocahontas think. They're racist idiots who are completely irrelevant to Warren's ambitions. To those on the left who were upset by this (and I think the claim of cultural appropriation is really, really outlandish in this instance) this wasn't meant for you either.
Basically, Warren had a story in her past that could be used as an attack against her, and Trump was doing it. She had two choices: ignore it and let speculation be wielded against her, or address it. As we saw with the stupid email non issue thing, you can make a non issue an issue if you let the right get to repeat it enough.
So, she elected to address it. Again, you have two options here: say you made a mistake on the form and shouldn't have claimed the status OR prove that the stories you were told as a child were true, and you DO, in fact, have some native ancestry in your family. The first option is rife with problems. It leaves you open to attack for lying to get an advantage, or being untrustworthy. When your excuse for something is "I did something wrong" that's a harder thing to get out of. Instead, she proved that, yes, she has a small part of her who is an indigenous person. Now, you can pivot those attacks that Trump will throw right back at him, and you can continually reference the fact he promised a million dollars to a charity of her choice if she took a DNA test.
This was not done for the idiots who call her Pocahontas. This was not done for people on the left who refresh Twitter 30 times an hour. This was done for your Joe Blow who pays attention to politics superficially while watching the evening news waiting on Wheel to start. And if you don't think this was focused grouped to hell and back, then idk what to tell you.
(And to be clear, I have no preference for 2020, outside not Bernie and not Biden.)
This is my thought. This is a significant win as far as the man-in-the-street goes. And I've long been skeptical of Warren and would still prefer Gillibrand or Harris, though I think Warren's jumped to third on my list of the serious contenders.