New York City Mayor Zohran Mamdani’s progressive movement achieved a clean sweep in Tuesday's Democratic congressional primaries, unseated powerful centrist incumbents and shaking up national politics. Among the defeated establishment figures were five-term Congressman Adriano Espaillat (leader of the Congressional Hispanic Caucus) and Dan Goldman (the AIPAC-backed lead lawyer in Trump's first impeachment trial). The victories by left-wing candidates Brad Lander, Darializa Avila Chevalier, and Claire Valdez signal a powerful leftward shift inside NYC's electorate, drawing parallels to the Tea Party movement's insurgent disruption of the Republican establishment in 2010. While Republicans are using the results to brand the Democratic party as "communist," the outcome intensifies an internal factional struggle for national Democratic leadership ahead of the November midterm elections.