Perhaps no president has been written of by more writers during his first two years as President than has the current occupant of the White House.Neither has any topped Donald Trump in his ability to polarize a nation. I, myself, find Mr. Trump a repugnant specimen of human nature. Yet, even as I curse him for his apparent lack of empathy for other human beings, I do occasionally find his approach to politics refreshing. Why?In search of an answer for that last question, I have read most every book about the guy. Woodward’s “Fear” is probably the greatest insight we ever shall have into the psyche of America’s closest approximation to Adolph Hitler.Because of “Fear,” I understand better as to why Donald J. Trump is the greatest threat to our republic.BLUSH FACTOR: There are profanities of most every sort. Still, since this is nonfiction, I hope every American reads “Fear.”The writing in “Fear” is thought-provoking and uneven. Because of Woodward’s dependence on Deep Background, I cannot rate it five stars. I WANT to know who said what, precisely.Still, this is the one great insight into Donald J. Trump that history will most appreciate.BOTTOM LINEFour stars out of five.