Fauci, who was then director of the National Institute of Allergy and Infectious Diseases and the Biden White House’s chief medical adviser, wrote in a Nov. 4, 2021, diary entry that Obama called him on his cellphone and, during an “incredibly memorable” 25-minute conversation, offered “to help in any way that he can” as Fauci faced an “onslaught of slanderous lies” from the political right.