US House Democratic leader Hakeem Jeffries has congratulated four winners of New York's Democratic congressional primaries, two of whom had declined to support him as a potential House speaker.

Jeffries congratulated Darializa Avila Chevalier, Claire Valdez, Brad Lander and Micah Lasher after their primary victories this week. All are expected to win in November in heavily Democratic districts.

"From public servants to union organisers to community activists, the path is different but the work is the same," Jeffries wrote on X.

"We must decisively address the affordability crisis and crush far-right extremism."

The primaries exposed divisions within the Democratic Party over Israel. Chevalier and Valdez, both members of the Democratic Socialists of America (DSA), are aligned with anti-Zionist politics, while Lander describes himself as a “liberal Zionist” who has criticised Israel's genocidal war on Gaza.