Some duties of the President of the United States are to command the U.S. Army, give information to the U.S. Congress, execute laws and make treaties. The President also makes nominations to certain offices such as justices of the U.S. Supreme Court. In addition, the President must take an oath of office before taking office.
The U.S. President is the commander in chief of the U.S. military. He also presides over each state militia if the militia is called into action for the United States. Although the President can enter into treaties with other nations, a treaty requires approval from the Senate. The President also makes nominations for justices of the U.S. Supreme Court, and his appointments are also subject to approval of the U.S. Senate. If a vacancy occurs while the Congress is in recess, the President may appoint a person to fill the vacancy until the end of the next session of Congress.
The U.S. Constitution calls upon the President to regularly update the U.S. Congress with information about the country. He also makes recommendations to Congress as to legislation that he believes matters to the business of the country. In extraordinary circumstances, the President may call on both houses of the U.S. Congress to meet. The President can also call on the head of any executive department to make a report to him about any relevant duties to the department.
The President makes sure that U.S. laws are faithfully carried out and he also commissions all officers of the United States. When taking the office of the President of the United States, the President must swear to uphold the Constitution of the United States. Although it is not mandatory, the President may pardon a convict for any offense against the United States.