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.

WASHINGTON (AP) — A series of bomb threats across multiple battleground states and baseless claims of wrongdoing by former President Donald Trump disrupted an otherwise smooth Election Day that capped a tumultuous presidential campaign.