when the supreme court announced the principle of one person one vote what did it mean
One man, one vote In the United States, the "one person, one vote" principle was invoked in a series of cases in the 1960s.[5][6][7][8][a] Applying the Equal Protection Clause of the United States Constitution, the Supreme Court majority opinion in Reynolds v. Sims (1964) ruled that state legislatures needed to redistrict in order to have congressional districts with roughly equal represented populations. In addition, the court ruled that, unlike the United States Congress, both houses of state legislatures needed to have representation based on districts containing roughly equal populations, with redistricting as needed after censuses.[10]