The fourth-ranking Democrat in the US House has lost his bid for another term in a New York primary.
Alexandria Ocasio-Cortez, a 28-year-old activist who ran on abolishing ICE and making Medicare a universal programme, defeated Congressman Joe Crowley in an upset.
Crowley is the first incumbent Democrat to lose renomination since 2014, when a Massachusetts Democrat was brought down by scandal.
Crowley, who was first elected in 1998, had grown his profile inside the party and faced no personal controversies.