She’s already broken barriers, and now Kamala Harris could shatter several more after President Joe Biden abruptly ended his reelection bid and endorsed her.

Biden announced Sunday that he was stepping aside after a disastrous debate performance catalyzed fears that the 81-year-old was too frail for a second term.

Harris is the first woman, Black person or person of South Asian descent to serve as vice president. If she becomes the Democratic nominee and defeats Republican candidate Donald Trump in November, she would be the first woman to serve as president.

Biden said Sunday that choosing Harris as his running mate was “the best decision I’ve made” and endorsed her as his successor.