Which of the following Supreme Court cases involved the principle of "one person, one vote"?

• A. Roe v. Wade
• B. Baker v. Carr
• C. Korematsu v United States
• D. Mapp v. Ohio

Answer: (B)

The principle of "one person, one vote" was established in the case of Baker v. Carr. This landmark Supreme Court case in 1962 addressed the issue of legislative redistricting, particularly in Tennessee, where population disparities had created unequal voting power among citizens. The Court ruled that such disparities violated the Equal Protection Clause of the Fourteenth Amendment, emphasizing that electoral district populations must be approximately equal to ensure fairness in representation.

This decision laid the groundwork for future cases concerning electoral districting and reinforced the idea that all voters should have equal weight in elections, hence the principle of "one person, one vote." The cases listed in the other options do not pertain to voting rights or electoral representation; instead, they address different constitutional issues, which is why Baker v. Carr is the correct answer in relation to this specific principle.