What is the primary duty of the President of the United States?

The primary duty of the President of the United States is to serve as the Chief Executive of the federal government. This includes executing and enforcing laws, appointing federal officials, and overseeing the various agencies and departments of the executive branch. The President is also responsible for commanding the military, conducting foreign policy, representing the country on the international stage, and proposing and signing legislation. Additionally, the President serves as a symbol of national unity and leadership, and is expected to address the concerns and priorities of the American people.