Amalgamated Clothing Workers of America

The Amalgamated Clothing Workers of America was a United States labor union known for its support for "social unionism" and progressive political causes. Led by Sidney Hillman for its first thirty years, it helped found the Congress of Industrial Organizations. Wikipedia*

On the C-SPAN Networks:
Amalgamated Clothing Workers of America has hosted 1 event in the C-SPAN Video Library; the first program was a 1964 Vignette.