||The European Union (EU) has actively sought to reinforce existing processes of political, economic and social integration beyond its borders, to other regional groups around the world. In particular, the EU has pursued Latin America to establish institutionalized region-to-region partnerships, through which they have actively promoted the integration of their sub-regional counterparts. The receptivity of Latin American regional projects to the EUs support has resulted in the emulation of European institutional design and processes of integration. Nevertheless, although they emulate European structures, none have been able to replicate the transfer of political authority that endows Europe with its distinctive supra-nationality. The following paper seeks to address these results and answer the question of why, given the EU support towards regional integration, supra-nationality is not present in the South American (Mercosur) or Central American (SICA) regional projects.