2020 primary debate guide: Everything you need to know ahead of the October showdown

Twelve Democratic primary hopefuls are gearing up to take the stage Tuesday night at Otterbein University in Westerville, Ohio, for the fourth Democratic primary debate, in what is being billed as the largest single debate in a U.S. presidential campaign cycle.

CNN and The New York Times will host the forum, which will air from 8 p.m. to 11 p.m. EDT.