The President of the United States of America has seven roles to fulfill during an elected term: Commander-in-Chief, Chief Executive, Chief Guardian of the Economy, Chief of Party, Chief of Legislature, Chief Diplomat and Chief of State. Each role of the president works together with the other roles to ensure that the country is run as smoothly as possible.
Unlike other nations, the U.S. President does not have complete control over the country because of limitations in the Constitution. Article II of the Constitution outlines the president's formal powers and responsibilities. The president might also have other responsibilities during his term, if any spontaneous events happen in the country or abroad.