What is the main responsibility of the President of the United States?

The main responsibility of the President of the United States is to act as the head of state and government. This role encompasses a wide range of duties, including enforcing federal laws, directing the executive branch of the government, and representing the nation in international affairs. As head of state, the President serves as a symbolic leader who represents the unity and integrity of the country, while as head of government, the President makes key decisions regarding domestic and foreign policy.

The other roles listed do not define the president's responsibilities. Serving as a member of Congress is specific to Senators and Representatives, and overseeing state governors is not a typical duty of the President, as governors operate at the state level with their own authorities. Leading the Supreme Court pertains to the Chief Justice, who is responsible for the judicial branch of government rather than the executive branch that the President leads.