Maricopa County, Arizona, which Biden won by a slim margin, has consistently been the subject of election denialism conspiracy theories. The other five — Michigan’s Wayne County, Pennsylvania’s Philadelphia County and Georgia’s DeKalb, Fulton and Gwinnett counties — were some of the largest Democratic strongholds in their respective states.

Authorities investigated false bomb threats throughout the state on Election Day, which the FBI said appeared to originate from Russian email domains.