United States: Politics and Governance

The United States is a federal presidential constitutional republic in which power is divided among three co-equal branches of government: the legislative branch, a bicameral Congress consisting of the Senate and House of Representatives; the executive branch, headed by a President elected through the Electoral College system to a four-year term; and the judicial branch, headed by the Supreme Court. This system of separation of powers and checks and balances, established by the Constitution ratified in 1788, is designed to prevent the concentration of authority in any single branch.

Political power is further divided between the federal government and the 50 individual states, each with its own constitution and government, reflecting the country's federalist structure. American politics has been dominated since the mid-nineteenth century by two major parties, the Democratic and Republican parties, and the country holds regular elections at the federal, state, and local levels. Contemporary political discourse centers on issues including healthcare policy, immigration, economic inequality, and the country's foreign policy role, with ongoing debate over the balance between federal and state authority.