Mexico's double transition—democratisation and internationalisation—offers a good case study to analyse the interaction between internationalisation processes and domestic developments during transitions to democracy. This article explains how the specific way in which Mexico linked with North America worked as a causal mechanism during the country's democratisation. In the end, an inadequate project of internationalisation—spearheaded by the North American Free Trade Agreement (NAFTA)—failed to fulfil its democratising potential.