NEW YORK (AP) — As Donald Trump’s party came together, a 28-year-old liberal activist ousted top House Democrat Joe Crowley in the president’s hometown Tuesday night, a stunning defeat that suddenly forced Democrats to confront their own internal divisions.

Crowley, the No. 4 House Democrat and until Tuesday considered a possible candidate to replace Nancy Pelosi as leader, becomes the first Democratic incumbent to fall this primary season. He was beaten by underfunded challenger Alexandria Ocasio-Cortez, a former Bernie Sanders organizer who caught fire with the party’s left wing.

Crowley’s loss echoed across the political world, sending the unmistakable message that divisions between the Democratic Party’s pragmatic and more liberal wings may be widening heading into the high-stakes November midterm elections. It also exposed a generational divide among Democrats still struggling with their identity in the Trump era.

“The community is ready for a movement of economic and social justice. That is what we tried to deliver,” Ocasio-Cortez said in an interview with The Associated Press. Born in the Bronx to a mother from Puerto Rico and a father who died in 2008, she said she knew she could connect with the district, which includes Queens and part of the Bronx.