A heated Brooklyn congressional primary is splitting the progressive movement, pitting establishment-backed Antonio Reynoso against the DSA and Mamdani-backed Claire Valdez.

• Reynoso is running to replace retiring Rep. Nydia Velázquez in a safe, deep-blue Brooklyn seat, with the vote 11 days out.
• He argues the real divide isn't progressive vs. establishment — it's the DSA going alone versus a broad coalition of unions, tenant groups, and the Working Families Party behind him.
• All three candidates agree on the big issues (calling Gaza a genocide, refusing APAC money), so the fight has turned into small-distinction "purity politics" over timing and donors.
• Both candidates broke their pledge to avoid super PAC money; Valdez has drawn around half a million in outside cash, some from donors who also gave to Republicans.
• Voters mainly care about affordability and ICE; Reynoso touts his record kicking ICE off Rikers and backing more housing.

Outlook: The June 23rd primary will test whether the DSA's go-it-alone approach or Reynoso's broad-coalition pitch wins in the era of Mamdani.