The President of the United States (POTUS // POH-təs)[note 2] is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.
In contemporary times, the president is looked upon as one of the world's most powerful political figures and as the leader of the only remaining global superpower. The role includes responsibility for the world's most expensive military that has the second largest nuclear arsenal. The president also leads the nation with the largest economy by nominal GDP. The president possesses significant domestic and international hard and soft power.
Article II of the Constitution establishes the executive branch of the federal government. It vests the executive power of the United States in the president. The power includes the execution and enforcement of federal law, alongside the responsibility of appointing federal executive, diplomatic, regulatory and judicial officers, and concluding treaties with foreign powers with the advice and consent of the Senate. The president is further empowered to grant federal pardons and reprieves, and to convene and adjourn either or both houses of Congress under extraordinary circumstances. The president directs the foreign and domestic policies of the United States, and takes an active role in promoting his policy priorities to members of Congress. In addition, as part of the system of checks and balances, Article One of the United States Constitution gives the president the power to sign or veto federal legislation. Since the office of president was established in 1789, its power has grown substantially, as has the power of the federal government as a whole.