Joe Biden

Democratic presidential candidate Joe Biden speaks to members of the press at the National Constitution Center in Philadelphia, March 10, 2020.

Joe Biden, born November 20, 1942, served as vice president of the United States from January 20, 2009 until January 20, 2017 under former U.S. President Barack Obama. Biden served as a United States senator from Delaware for over 35 years. He was one of the youngest senators ever elected in 1972. Weeks after his election Biden's wife and one-year-old daughter Naomi were killed in an automobile accident. 

Biden served as chairman of several committees during his six terms in the U.S. Senate and became a leading voice in the senate regarding U.S. foreign policy, eventually serving as chairman of the Senate Foreign Relations Committee.  Biden unsuccessfully sought the Democratic presidential nomination in 1988 and in 2008, but became the party's likely-nominee in 2020 to take on Donald Trump after U.S. Senator Bernie Sanders dropped out of the race.