Late one afternoon, while Sam Rayburn was still alive, Johnson walked into Rayburn’s Board of Education. Instead of walking over and kissing Rayburn, as he usually did, he sat down without a word in one of the dark leather easy chairs, and put his head in his hands. Then he sat there for long minutes, oblivious to the other men in the room. His head kept dropping lower, until it was barely above his knees. And then, in a very low voice, Lyndon Johnson said, “Being vice president is like being a cut dog.”