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"?