 This is the letter I think was first reported by the New York Times. The DNC moved towards a virtual vote before the debate in response to Ohio's threatening to not put Biden on the ballot because the party's convention was after their deadline. Ohio changed the rule, but the DNC has pushed forward, arguing that the legislature could, in theory, reverse itself. The suggestion that the timeline for the virtual roll call has been accelerated is false. DNC Chair Jamie Harrison said in a statement to Axios, the timeline for the virtual roll call process remains unscheduled and unchanged from the DNC made that decision in May.