Parties and the party system. In the 2018 Mexican elections

Abstract

This paper analyses the changes that affected the Mexican political parties and the party system during President Enrique Peña Nieto’s six-year term in office. Between 2012-2018, we witnessed the erosion and subsequent collapse of the system of three major parties that had been formed and consolidated during the process of political liberalization in Mexico. This transformation may be observed in the evolution of electoral preferences, the internal crises of the parties, and in changes to electoral legislation.