In this article, we investigate the moderating role of political sophistication on the vote for populist parties in Belgium. Building on the literature about the diverse determinants of populist party support, we investigate whether issue considerations and populism-related motivations play a bigger role in the electoral calculus of politically sophisticated voters.
Using data from the 2019 general elections in Belgium, we focus on the cases of Vlaams Belang (VB) and Parti du Travail de Belgique- Partij van de Arbeid (PTB-PVDA). We find evidence suggesting that political sophistication enhances the impact of populism-related motivations on populist party support, although the effects are contingent on the party. Moreover, we show that, for issue considerations, the moderation effect only comes into play for VB voters: the impact of anti-immigrant considerations is greater at increasing levels of political sophistication.

Recent research demonstrates that political parties in western Europe are generally structured along one dimension – and often take more or less similar ideological positions on the economic and cultural dimension – whereas the policy preferences of voters are structured two dimensionally; a considerable part of the electorate combines left-wing stances on one dimension with right-wing stances on the other. These ideologically ‘unserved’ voters are the main focus of this study. Using data from a large-scale survey in Flanders and Wallonia, we demonstrate how the salience of the two dimensions explains whether these unserved voters ultimately end up voting for a right-wing or a left-wing party. Specifically, we show that these voters elect a party that is ideologically closest on the dimension that they deem most important at that time. To summarise, the findings of this study confirm that salience is a key driver of electoral choice, especially for cross-pressured voters.

This study investigates how protest attitudes and ideological considerations affected the 2019 election results in Belgium, and particularly the vote for the radical right-wing populist party Vlaams Belang (VB) and for the radical left-wing populist party Partij van de Arbeid-Parti du Travail de Belgique (PVDA-PTB). Our results confirm that both protest attitudes and ideological considerations play a role to distinguish radical populist voters from mainstream party voters in general. However, when opposed to their second-best choice, we show that particularly protest attitudes matter. Moreover, in comparing radical right- and left-wing populist voters, the article disentangles the respective weight of these drivers on the two ends of the political spectrum. Being able to portray itself as an alternative to mainstream can give these parties an edge among a certain category of voters, albeit this position is also difficult to hold in the long run.