This chapter presents the evolution of the Buenos Aires Metropolitan Region (BAMR) and the attempts to create coordinated governance mechanisms within it. The case documents and analyzes the significant barriers, such as partisan conflict and a lack of intergovernmental cooperation, that have historically prevented the development of a unified metropolitan perspective and its institutions. The chapter investigates how in the absence of effective metropolitan authorities, the federal government has often had to manage interjurisdictional issues, leading to tensions among federal, provincial, and municipal governments. The study also suggests that territorial and political fragmentation are deeply interconnected, and the influence of the highest political authority can either help or hinder coordination efforts. The historical legacy of the last military dictatorship is also explored, as it initiated a top-down regionalization process that laid the groundwork for further metropolitan planning efforts. This study serves as a compelling case of how democratic plurality and partisan interests can obstruct effective metropolitan governance.