Weeks after indicating that she is considering a run for president in 2020, Sen. Elizabeth Warren (D-Mass.) released DNA test results on Monday that confirmed she has Native American ancestry—showing that President Donald Trump’s attacks on her heritage were not only racist, but baseless as well.

A nearly six-minute video posted to Warren’s “Fact Squad” website details Warren’s family history and upbringing in Oklahoma and shows a genetics professor from Stanford University confirming that Warren has Native American ancestry from six to 10 generations ago.”Trump can say whatever he wants about me. But mocking Native Americans or any group in order to try to get at me—that’s not what America stands for.” —Sen. Elizabeth Warren (D-Mass.)

With the video release, Warren appears intent on putting to rest the president’s main line of attack on her ahead of a potential presidential challenge.

“Some people have questioned my heritage and my family history,” Warren says in the video. “Maybe they do it to insult me, maybe they do it to distract from the kinds of changes I’m fighting for and the kinds of changes I’m trying to bring to Washington. Maybe they do it because they think politics is a bloodsport. But my parents were real people. The love they shared, the struggles they endured, the family they built, the story they lived will always be etched on my heart. And no one—not even the President of the United States—will ever take it away from me.”