The US Secret Service has dubiously claimed to The Post that it has “no records” of visitors to Biden’s two Delaware residences and therefore cannot divulge that information in response to a FOIA request. Biden was at his residences in Wilmington and Rehoboth Beach on about one-quarter of all days during his first year in office, but little is known about who stopped by for official meetings or less formal lobbying efforts — such as by members of his family and their associates. The Post sought more than one year of visitor log records, including for Biden’s first year in...