She’s already broken barriers, and now Kamala Harris could become the first Black woman to head a major party presidential ticket after President Joe Biden abruptly ended his reelection bid and endorsed her.

Biden announced Sunday that was stepping aside amid widespread concerns about the viability of his candidacy.

Harris is the first woman, Black person or person of South Asian descent to serve as vice president. She joined the Biden ticket after a rocky and abbreviated run of her own for the 2020 Democratic presidential nomination.