Vermont became the 14th state to join the Union on March 4, 1791. Vermont’s first two senators, Stephen Bradley and Moses Robinson, took office on October 17, 1791. Vermont’s longest-serving senators include Justin Morrill (1867-1898), George Aiken (1941-1975), and Patrick Leahy (1975-present). Among those who rose to leadership positions are Solomon Foot and George Edmunds, both of whom served as the Senate’s president pro tempore. Leahy currently serves as the Senate's president pro tempore.