US Senate career of Joe Biden

Joe Biden served as a United States senator representing Delaware from January 3, 1973, to January 15, 2009, then served as Vice President of the United States from January 20, 2009 to January 20, 2017. A member of the Democratic Party, Biden was narrowly elected to the Senate in 1972 and won re-election six other times; having served for 36 years, he remains Delaware's longest-serving U.S. senator.

Source: Wikipedia — US Senate career of Joe Biden (CC BY-SA 4.0)