In 1974 he was elected its chairman and he served in that role until 1976 .
Rangel was an original member when the Congressional Black Caucus was formed in 1971 .
In 1974 Rangel was elected Congressional Black Caucus ' chairman and Rangel served in that role until 1976 .
Rangel was an original member when the Congressional Black Caucus was formed in 1971 .