He sounds liberal biased to me, but, I never heard of this person.
Not much doubt.
A highly respected presidential historian with particular expertise on the Kennedy family, his publications include “Robert Kennedy: Brother Protector” (1998); “The Kennedy Administration” in Presidential Administration Profiles, (1999); “John Fitzgerald Kennedy” and “Robert Francis Kennedy,” Historic World Leaders (1994); and “John F. Kennedy: an Idealist without Illusions” (1975).
"Idealist without illusions"?