[US Democratic primaries: Number of states (including DC) won by Joe Biden to be] 21 to 30

Created by Cato on 2019-11-22; known on 2020-08-21; judged wrong by Cato on 2020-06-03.

• Cato estimated 3% on 2019-11-22
• pranomostro estimated 20% on 2019-12-02
• Cato estimated 5% on 2019-12-03
• Cato estimated 65% on 2019-12-26
• Bruno Parga estimated 67% on 2020-01-04
• Cato estimated 81% on 2020-01-07
• Cato changed the deadline from “on 2020-06-02” on 2020-05-28
• Cato   judged this prediction right on 2020-06-03.
• Cato   judged this prediction wrong on 2020-06-03.