Conrad Black the Historian
The Invincible Quest is thorough, and Black gives credit to Nixon for his many accomplishments. Not least of these is Nixon's political genius, which is especially well described in passages dealing with Nixon's key role in the late-1940s and early-1950s Republican Party, his maneuvering into the Vice-Presidency, and some of the dramatic policy coups of his first term as President. Black treats Nixon's personality with sympathy, though he does not whitewash the man's moral flaws and cynicism.
Black, who had previously written a well-received biography of Franklin D. Roosevelt, fondly peppers his life of Nixon with a few more FDR anecdotes. And though Black also shows much genuine admiration for Presidents Truman and Johnson, Black's outlook in The Invincible Quest is ultimately conservative. (He praises tax-cutting as uncritically as he bemoans supposed welfare cheats.)
Only Nixon could go to China; Black, on the other hand, lacks the left-wing credentials to seem a truly objective and disinterested Nixon apologist.