who is the leader of the senate called
Party leaders of the United States Senate The Constitution designates the Vice President of the United States as President of the United States Senate. The Constitution also calls for a President pro tempore to serve as the leader of the body when the President of the Senate (the Vice President) is absent. In practice, neither the Vice President nor the President pro tempore—customarily the most senior (longest-serving) Senator in the majority party—actually presides over the Senate on a daily basis; that task is given to junior Senators of the majority party. Since the Vice President may be of a different party than the majority and is not a member subject to discipline, the rules of procedure of the Senate give the presiding officer very little power and none beyond the presiding role. For these reasons, it is the Majority Leader who, in practice, manages the Senate. This is in contrast to the House of Representatives where the elected Speaker of the House has a great deal of discretionary power and generally presides over votes on bills.[citation needed]
President pro tempore of the United States Senate The President pro tempore of the United States Senate (often shortened to president pro tem) is the second-highest-ranking official of the United States Senate. Article One, Section Three of the United States Constitution provides that the Vice President of the United States is the President of the Senate (despite not being a Senator), and mandates that the Senate must choose a President pro tempore to act in the Vice President's absence. Unlike the Vice President, the President pro tempore is an elected member of the Senate, able to speak or vote on any issue. Selected by the Senate at large, the President pro tempore has enjoyed many privileges and some limited powers.[2] During the Vice President's absence, the President pro tempore is empowered to preside over Senate sessions. In practice, neither the Vice President nor the President pro tempore usually presides; instead, the duty of presiding officer is rotated among junior U.S. Senators of the majority party to give them experience in parliamentary procedure.[3]