The first session of the Senate was held in Philadelphia, Pennsylvania on December 6, 1790. Their first meeting in Washington, D.C. was held on November 17, 1800. Their first meeting in the current chamber was on January 4, 1859. The first former president to be elected president was Andrew Johnson on March 4, 1875. The first senator to be elected before presidency was Warren G. Harding on November 2, 1920. The first woman elected was Hattie Caraway on January 12, 1932. The first African American to be elected was Hiram R. Revels on February 25, 1870.

There are several senators that meet in Washington, D.C. They have majority leaders and minority leaders. The majority leader is a leader elected by the majority party and the minority leader is the leader elected by the other party. The first senator to serve thirty years was Thomas Hart Benton. He was a Democratic from Missouri. He served from 1821-1851. The first officially designated...