How a Labor Union Bested the Political Establishment in New York

The United Auto Workers has grown in size by opening its tent to workers in white-collar professions, and by adopting democratic socialist stances. But its growth has also led to political friction.The U.A.W. Region 9A branch, led by Brandon Mancilla, left, endorsed Claire Valdez, Darializa Avila Chevalier and Brad Lander in their successful House primary bids in June.