Squires' . . . grandfather was a sheriff's deputy who carried a gun and a clenched fist, a man whose talk with cronies was full of references to 'sonofabitching judges' and 'goddamn n*****s.' He was also, Squires relates, one of the muscle men behind a vicious cabal of power brokers headed by one Boss Crump. . . . That machine involved, for a time, much of Nashville's leading citizenry. It engineered elections, stole votes, organized lynch mobs, ran an illegal gambling empire, and in the 1950s,