The 2020 presidential campaign of Joe Biden began on April 25, 2019, when Biden released a video announcing his candidacy in the 2020 Democratic party presidential primaries. Joe Biden, the former vice president of the United States and a former U.S. senator from Delaware, had been the subject of widespread speculation as a potential 2020 candidate after declining to be a candidate in the 2016 …

https://en.m.wikipedia.org/wiki/Joe_Biden_2020_presidential_campaign