House Democratic Leadership

Jonathan Paz, an organizer and former Waltham, Mass., city councilor, announced in a video that he will challenge House Minority Whip Katherine Clark for her Massachusetts congressional seat in the 2026 cycle. Paz argues Democratic leaders have failed to stop Trump or ease affordability pressures, while Republicans seized on the challenge to tie it to New York City mayor‑elect Zohran Mamdani’s left flank; Clark is the second‑highest‑ranking House Democrat and would be the highest‑ranking Democrat facing a primary this cycle.