LBJ and the Majority Leadership and various Senate activities, 1955; committee assignments; LBJ and Drew Pearson; LBJ and the oil industry; foreign aid; LBJ and organized labor; Paul Butler; LBJ and Eisenhower; LBJ's heart attack; Whitney speech; 1956 Senate activities; attempt to build national position; civil rights; natural gas bill; Allan Shivers episode; state Democratic convention, 1956