Recent literature has advanced our understanding of local politics and electoral mobilization, focusing on political relationships between politicians and voters and the roles of political brokers. Drawing from ethnographic research on local councilors and their political staff in São Paulo, Brazil, this article introduces a critical contribution: the concept of mandatos. These are networks of actors linked by partisan, political, professional, and personal ties, which help mobilize support for politicians. By bridging formal institutions and informal practices, mandatos transform specific urban territories into constituencies. Their structure and actions transcend individual brokers and mediate larger entities, such as political parties, legislative bodies, and executive agencies, as well as smaller local groups and voters. While brokers play a key role, mandatos are more complex and dynamic than the hierarchical view of brokers and politicians suggests. This article invites scholars to rethink how we understand local representation and electoral networks.