Six key people protected the president.
Jill Biden, the first lady, and Hunter Biden, his eldest son, fervently believed in his ability to win. Mr. Donilon and Steve Ricchetti, the counselor to Mr. Biden, knew when and how to deliver information, along with Annie Tomasini, the deputy chief of staff. She and Anthony Bernal, the first lady’s most senior aide, took tight control over the president’s public schedule.