Final answer:
The Supreme Court's ruling in Wesberry v. Sanders supported the principle of 'one person, one vote', ensuring equal representation in congressional districts.
Step-by-step explanation:
The Supreme Court's ruling in Wesberry v. Sanders was that one person's vote should be worth the same as another's, establishing the principle of one person, one vote. This directive aimed to ensure that each congressional district contained roughly the same number of people, thus each person’s vote would have equal weight. This decision was part of a broader movement during the 1960s to reform voting rights and address issues of malapportionment in electoral districts, where previously, population imbalances allowed some rural districts to have disproportionate voting power compared to more populous urban districts.