The Voting Rights Act of 1965 is widely known as the most effective civil rights statute in history. This is an expected distinction, as President Johnson asked for and ultimately signed the “goddamnedest toughest” legislation possible. But the President and the 89th Congress could not do this important work alone. They knew that the substantive provisions of the statute presented a difficult challenge to established constitutional norms and for this reason they offered a broad and expansive statutory canvass. In so doing, and as this Article argues, they implicitly enlisted the U.S. Supreme Court as a key player in the fight against voting discrimination. Unsure about the constitutional boundaries at issue, Congress and the administrat...