Some of the institutions behind Tuesday’s progressive surge are already supporting candidates around the country

Published

June 26, 2026 6:30AM (EDT)

On election morning, New York City Mayor Zohran Mamdani joins former New York City Comptroller Brad Lander as he campaigns for Congress outside of an election polling center, June 23, 2026 in the Lower East Side neighborhood of New York City. (Photo by Andrew Lichtenstein/Corbis via Getty Images)

On Tuesday, left-aligned institutions working within the Democratic Party flexed their political muscles as insurgent progressive candidates carrying all three major contested congressional primaries on Tuesday — two of which were against high-profile incumbents. While the rest of the political class is arguing over whether the brand of democratic socialism that looked ascendant in New York can be exported to other parts of the country, some of the groups behind Tuesday’s win are already testing just that.