Coming late in a heated presidential campaign, the article suggested that Joseph R. Biden Jr. had used his position to enrich his son Hunter when he was vice president. The Post based the story on photos and documents the paper said it had taken from the hard drive of a laptop purportedly belonging to Hunter Biden.
The article named two sources: Stephen K. Bannon, the former adviser to President Trump now facing federal fraud charges, who was said to have made the paper aware of the hard drive last month; and Rudolph W. Giuliani, the president’s personal lawyer, who was said to have given the paper “a copy” of the hard drive on Oct. 11.
The article also suggested that the elder Mr. Biden had met with a Burisma adviser, Vadym Pozharskyi. On Wednesday, a Biden campaign spokesman said that Mr. Biden’s official schedules showed no meeting between the former vice president and the adviser. Last month, two Republican-led Senate committees investigating the matter said they had found no evidence of wrongdoing by the former vice president.