Oh, one more thing: the point of Johnson in 1949 and 1957 was that Truman's anti-lynching bill wasn't going to pass, no matter what Johnson did, nor was Eisenhower's in 1957 (without some major changes). It's not that Johnson scuttled these bills, it's that since whatever he did wouldn't affect the outcome, he played them to his own advantage rather than be on the right side of a losing issue. When he thought he could win by being on the right side, he fought like a maniac.