what is the job of the us president
President of the United States The President of the United States (informally referred to as POTUS)[10][note 2] is the head of state and head of government of the United States of America. He directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.
Chief Justice of the United States The Chief Justice leads the business of the Supreme Court and presides over oral arguments. When the court renders an opinion, the Chief Justice—when in the majority—decides who writes the court's opinion. The Chief Justice also has significant agenda-setting power over the court's meetings. In the case of an impeachment of a President of the United States, which has occurred twice, the Chief Justice presides over the trial in the U.S. Senate. Additionally, the presidential oath of office is typically administered by the Chief Justice (although the Constitution does not assign this duty to anyone in particular).