According to the author, what does Russell JR. gain from LBJ as noted in the nonfiction book, Master of the Senate: The Years of Lyndon Johnson?

According to the author, Russell Jr. gains a loyal actor for the southern cause in LBJ. LBJ is interested in furthering his political career and is willing to appease Russell Jr in any way possible, including participating in a filibuster against the civil rights legislation proposed by Truman.