The President of the United States serves as head of the Executive branch of government, with the Vice-President serving as second-in-command. In addition to acting as the head of state, the President also serves as Commander in Chief of the U.S. military and appoints the heads of all federal agencies.
Comprising the President and Vice President of the United States, the Cabinet appointed by the President also falls under the Executive branch of the United States government. These appointed leaders along with heads of federal agencies ensure the enforcement and administration of federal laws throughout the country. As this branch includes all members of the armed forces, the total number of people employed by the Executive branch tops the four million mark.