This paper analyzes the role of political neighborhood brokers in executing public policies in slums. It studies their relationships with the State and their capabilities to boost or hinder the implementation of public policies. In particular, the paper focuses on the redevelopment processes at two slums in the City of Buenos Aires: Rodrigo Bueno and Playón de Chacarita. The evidence gathered shows that if the State and the brokers establish cooperation relationships, the redevelopment process smoothly moves forward. On the contrary, the entire process is put at risk if they come into conflict. Furthermore, the absence of brokers compels the State to lead the redevelopment without links to the neighborhood, obstructing the project's development. The same situation occurs if brokers lose their legitimacy.