Which organization did Shirley Chisholm help to establish?

Shirley Chisholm played a significant role in establishing the Congressional Black Caucus, which was formed in 1971. This organization was created to give a collective voice to African American members of Congress and to address the legislative needs and concerns of the Black community. Chisholm’s involvement was crucial as she was one of the first two African American women elected to Congress and was a strong advocate for civil rights, social justice, and education.

The other organizations mentioned, while important, are not associated with her founding. For instance, the National Women's Political Caucus focuses on increasing women's participation in politics but was established in 1971 independently of Chisholm. The National Democratic Party and the American Civil Liberties Union also do valuable work within their respective realms but do not directly relate to Chisholm's initiatives or legacy in the same way as the Congressional Black Caucus.