You could be forgiven if you have been vaguely keeping one eye on news coverage of the Democratic primary, and more or less understood there to be around 5 to 8 major candidates that are seriously in the hunt for the Democratic nomination. Joe Biden, Bernie Sanders, Elizabeth Warren, Kamala Harris, and Pete Buttigieg have all generated a lot of headlines, while several others such as Andrew Yang, Corey Booker, and Tulsi Gabbard have also amassed fervent fan bases.