The Citizens' Rights Union, or CRU, was a radical political group in the People's Republic of Haven.
The Legislaturists relied on Internal Security (InSec) moles that Constance Palmer-Levy had deep within the leadership of the Citizens' Rights Union. Knowing the extent of infiltration from Oscar Saint-Just, Rob S. Pierre told Cordelia Ransom to separate her cells from the main body of the Citizens' Rights Union. It was those cells that would assassinate Constance Palmer-Levy and use People's Navy assault shuttles to wipe out the Hereditary President and the leading Legislaturists in a "military coup".
Following the Pierre Coup, the members of the Citizens' Rights Union either retired, began working for the Committee, or were purged. It is strongly implied that the cells that carried out the airstrike against the People's Palace were eliminated. (HH3)