Argentina has a presidential representative democratic republic form of government. The President serves as both the head of state and head of government, exercising executive power. The government operates under a federal system and divides into three branches: executive, legislative, and judiciary. The legislative branch is bicameral, consisting of the Senate and the Chamber of Deputies, while the judiciary is independent. The President is elected by direct vote and serves a four-year term, eligible for re-election. Each of Argentina's 23 provinces and the Autonomous City of Buenos Aires has its own constitution and government, consistent with the national constitution.