Through the analysis of a survey conducted in São Paulo the authors examine the representativity of the Brazilian trade union confederations towards the members of affiliated unions. The focus of analysis is given by the question of the capability of the union centrals of effectively reaching their rank and file and of turning their discourses and practices into elements for the constitution of identities on the union and political levels. The initial answer is positive: there is such a power. Further analysis reveals significant differences between trade union confederations concerning both political and unionist attitudes and practices.
