The term D.C. Title refers to four different positions in the United States government: Senator (SEN), President (PRES), Chairman of the Joint Chiefs of Staff (CIC), and Representative (REP). The Senator is a member of the United States Senate, which is part of the legislative branch of the federal government. The President is the head of the executive branch of the federal government. The Chairman of the Joint Chiefs of Staff is the highest-ranking military officer in the United States Armed Forces. The Representative is a member of the United States House of Representatives, which is also part of the legislative branch of the federal government.