A bag of cocaine found in the West Wing last month reportedly may have belonged to someone in the “Biden family orbit” — and the president allegedly knows who it is. Soldier of Fortune publisher Susan Katz Keating made the shocking claim, citing three security sources, in a report published Sunday — even texting a number linked to President Biden in a bid to sniff out the culprit. The Post has not been able to independently confirm the Soldier of Fortune report and the Secret Service has vehemently denied it. According to Keating, while the Secret Service publicly announced July...