**ADVANCE FOR MONDAY AUG 25** **FILE** In this file photo of Jan. 2, 1953, Sen. Ernest W. Macfarland (D-Ariz), left, and Sen. Lyndon Johnson (D-Tex) meet at the capitol Washington. Johnson is the new democratic floor leader in the U.S. Senate replacing Macfarland. As the centennial of Johnson's birth approaches, historian Robert A. Caro plans to remember his longtime subject at his happiest and most fulfilled, when he was leader of the U.S. Senate. (AP Photo/File)