The 29-year-old democratic socialist from the Bronx has won her race in New York’s 14th District.

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Democrat Alexandria Ocasio-Cortez pulled off the biggest upset of the primary season when she defeated Rep. Joe Crowley in New York’s 14th District. Now, at 29, she has become the youngest woman elected to Congress.

A democratic socialist, she ran on a proudly leftist agenda and supports Medicare-for-all, abolishing ICE, and a creating federal jobs guarantee program. She positioned herself as a woman of the people, and her win was a major victory for progressives. Crowley had served in Congress since 1999 and was widely seen as House Minority Leader Nancy Pelosi’s eventual successor; Ocasio-Cortez’s victory showed that Democrats can run on socialist ideas and win, even against establishment favorites.

While she’s faced harsh criticism from conservative pundits, Ocasio-Cortez has already become a breakout star of the Democratic Party, campaigning for other candidates of color across the country leading up to Election Day.

Her win makes her the youngest woman sent to Congress — at 29, she beats out Republican Rep. Elise Stefanik, the previous youngest at 30.