The legendary Speaker of the U.S. House, Sam Rayburn, coined a famous phrase he used often and imparted to young congressmen when they would arrive on Capitol Hill full of vim and vigor. He would sit down with them and invite them to have a bourbon and branch water with him. The old gentleman, who had spent nearly half a century in Congress, after hearing their ambitions of how they were going to change the world, would look them in the eye and say, “You know here in Congress there are 435 prima donnas and they all can’t be lead horses.” Then the Speaker in his Texas drawl would say, “If you w...