The disruption of an institutionalised and polarised party system: Discontent with democracy and the rise of Nayib Bukele in El Salvador

Studies on party system collapse or individual-party breakdowns view programmatic inconsistency or convergence as necessary for abrupt party system change. In theory, a new or fringe contender can suddenly emerge and disrupt the party system under such circumstances. We test that claim by examining Nayib Bukele’s 2019 presidential election victory in El Salvador. With data from the AmericasBarometer, we estimate probit models and predictive margins to examine the individual-level determinants of disruption in an institutionalised and ideologically polarised party system. The empirical results reveal that Bukele won amid salient ideological differences between traditional parties and that critical views towards democracy fueled his core support. Therefore, we conclude that a significant disruption in an institutionalised party system can occur notwithstanding robust ideological differences between leading contenders. Critical attitudes towards democracy can represent a driving force behind a party system’s disruption.