Before 2013 begins, catch up on the best of 2012. From now until the New Year, we will be re-posting some of The New Republic’s most thought-provoking pieces of the year. Enjoy. The Years of Lyndon Johnson: The Passage of PowerBy Robert A. Caro (Knopf, 712 pp., $35) I. MANY LIBERAL Democrats have yet to come to terms with Lyndon Johnson.