The Greatest Comeback: How Richard Nixon Rose from Defeat to Create the New Majority by Patrick J. Buchanan Crown Forum, 2014, 400 pages, US$28 Being Nixon: A Man Divided by Evan Thomas Random House, 2015, 640 pages, US$35 The Quiet Man: The Indispensable Presidency of George H.W. Bush by John Sununu Broadside Books, 2015, 432 pages, US$28.99   The paramount question of the second half of the twentieth century was what to do about communism, and the indispensable man in that confrontation was Ronald Reagan. It is tempting, therefore, to believe that the times could be summed up in a…