Like history, the racial gerrymandering cause of action has repeated itself, the first time as tragedy, the second time as farce.In the 1990s, conservative members of the Supreme Court recognized a new cause of action, grounded in the Fourteenth Amendment’s Equal Protection Clause, of an “unconstitutional racial gerrymander.” The claim was not one, long recognized, for the intentional dilution of black votes through the manipulative drawing of district lines. Instead, it was a shaky, ephemeral claim based solely on appearances. Racial gerrymandering is an “expressive harm,” aimed at preventing jurisdictions from sending an impermissible “message” by separating voters on the basis of race without adequate justification. In practice, the caus...