Democratic Party presidential primaries, 2020

After the surprising defeat of Hillary Clinton in the 2016 presidential election, Democrats were left to search for a new generation of candidates to challenge President Donald Trump. The primaries first started with a field of six candidates (Cory Booker, Kamala Harris, Martin O'Malley, Tim Kaine, Sherrod Brown, and Lincoln Chafee); however, the field was reduced to Booker and Harris by Super Tuesday, as Chafee and O'Malley withdrew before the start of the campaign and Kaine and Brown withdrew early on due to low polling numbers and poor contest results.