O’Donnell was President Kennedy’s special assistant and appointments secretary, charged with managing the President’s timetable, from 1961 to 1963, before serving as presidential aide to Lyndon Johnson. His character is portrayed by Kevin Costner in the movie Thirteen Days.

Abbie Rowe. White House Photographs. John F. Kennedy Presidential Library and Museum, Boston. Digital Identifier: JFKWHP-AR6295-I.