In a pair of cases decided in 1964, the Supreme Court of the United States famously established the “one person, one vote” test, which held that all congressional districts must have the same number of people, as must all state legislative districts. The consequences of those decisions were both immediate and far-reaching. A wave of mid-decade redistricting swept the country, as virtually every congressional and legislative district had to be, at a minimum, tweaked to account for population discrepancies. Rural districts in particular lost representation, while the depopulation of urban centers helped usher in the rise of the suburbs in Congress. Last week, the Supreme Court shocked watchers by agreeing to hear a case that could have consequences of a similar magnitude. In 1966, in a follow-up to the Reynolds v. Sims decision, the court had held that states did not necessarily need to use persons as the basis for their representation schemes. Since then the court has at times been asked to adopt various different metrics. It generally resisted these entreaties, although Justice Clarence Thomas has, at times, urged the court to take up these cases.
