The checks and balances in the United States are a system incorporated within the Constitution, designed to prevent any single branch (Legislative, Executive, and Judicial) from dominating or abusing power. This system allows each branch to monitor, limit and control the other branches' actions. For instance, the President (Executive) can veto laws proposed by Congress (Legislative), while Congress can override vetoes and impeach the President. The Supreme Court (Judicial) can declare laws unconstitutional, but its judges are appointed by the President and confirmed by the Senate.