What is the main conflict in Master of the Senate: The Years of Lyndon Johnson by Robert Caro?

Master of the Senate is also a study of how legislative power works in America and how Johnson mastered the Senate as no political leader had before him. Caro describes the ups and downs of Senate history, particularly in relation to the power of the Executive Branch, showing that in 1949 it was a tradition-rich, decentralized, inefficient body.