black caucus (1964)

[Benjamin Zimmer]

black caucus (OED3 1967)

http://links.jstor.org/sici?sici=0003-1224%28196404%2929%3A2%3C226%3AEIAWC%3E2.0.CO%3B2-3

Economic Insecurity and Working-Class Consciousness
John C. Leggett
American Sociological Review, Vol. 29, No. 2. (Apr., 1964), p. 233.
A relatively new organization, the all-Negro Trade Union Leadership
Council (TULC), constitutes a "black caucus" of approximately 9,000
Negroes, functions largely within the UAW, enjoys considerable member
participation, and undoubtedly contributes to the class and racial
consciousness of Negro workmen throughout Detroit.


--Ben Zimmer