When did Joe Biden run for president?

Related questions

1. What race is Kellyanne Conway's husband?
2. Is Bernie running in 2020?
3. How does the caucus process work?
4. Has any president not run for reelection?
5. Can a two term president run for vice president?
6. Can an incumbent president be primaried?
7. What does it mean to caucus for a candidate?
8. Does an incumbent president have to run in the primaries?
9. Will Republicans primary Trump in 2020?
10. What is the name of the Vice President of the United States now?

Tags

1. #train
2. #candidacy
3. #presidential
4. #station
5. #wilmington
6. #democratic
7. #campaign
8. #biden
9. #nomination
10. #declaring
11. #formally