Nixon v. Herndon, involved

A.
President Nixon's illegal activities while in office and required him to institute affirmative action programs to remedy racial discrimination.

B.
Ended the use of literacy tests in voting.

C.
Held that the NAACP could not be forced to disclose its membership list to the President in order to protect the privacy of its members and protect them from retaliation.

D.
Required states to not discriminate on the basis of race on who could vote.