Which describes how the Senate's proportional seats are allocated in Mexico?

Which describes how the Senate's proportional seats are allocated in Mexico?

• A. Through single-member districts in each state
• B. By regional blocks with a fixed number of seats per region
• C. Through a mixed system combining district and proportional seats
• D. By national proportional representation using party lists to allocate 32 PR seats

Answer: (D)

Proportional representation in the Senate is allocated nationally using party lists to fill 32 seats. This means these seats are not tied to a specific state or regional bloc; instead, parties receive a share of these seats based on their total vote share across the entire country. The result is that the overall party composition in the Senate better mirrors national support, complementing the remaining seats that are decided by state-level contests. This combination creates a mixed system: most seats come from state-based elections, while a fixed number are distributed nationwide through proportional representation.