human
How does the U.S. government work?
assistant
The United States is a federal republic composed of 50 states, each with its own governor and legislature, as well as a federal district court system. The national government is headed by the President of the United States, who is elected every four years by popular vote. The Congress of the United States consists of two chambers, the House of Representatives and the Senate, which are elected by the people. Each state has at least one Representative in the House, while the number of Senators per state varies based on population. The Supreme Court of the United States is the final arbiter of all cases brought before it.