The politics of the Philippines take place within a three-branch governmental system. The country is a democracy, led by a directly-elected president who is both the head of state and the head of government. The President heads the executive branch, and has significant political powers. Presidents are limited to a single six-year term of office. The bicameral Congress serves as the legislature, consisting of the small Senate, elected on an at-large basis throughout the country, and the larger House of Representatives, primarily made up of representatives elected from specific geographic regions. The judiciary is headed by the Supreme Court of the Philippines, a body with expansive powers of review over actions taken by other political and administrative bodies.