He had previously served as the 37th vice president from 1961 to 1963 under President John F. Kennedy, and was sworn in shortly after Kennedy's assassination. A Democrat from Texas, Johnson also served as a U.S. representative, U.S. senator and the Senate's majority leader. He holds the distinction of being one of the few presidents who served in all elected offices at the federal level.
Born in a farmhouse in Stonewall, Texas, to a local political family, Johnson worked as a high school teacher and a congressional aide before winning election to the U.S. House of Representatives in 1937. He won election to the United States Senate in 1948 after a narrow and controversial victory in the Democratic Party's primary.[2] He was appointed to the position of Senate Majority Whip in 1951. He became the Senate Democratic leader in 1953 and majority leader in 1954. In 1960 Johnson ran for the Democratic nomination for president. Ultimately, Senator Kennedy bested Johnson and his other rivals for the nomination, then surprised many by offering to make Johnson his vice presidential running mate.  The Kennedy-Johnson ticket won in the 1960 presidential election. 