Effects of populism: The agenda of fact-checking agencies to counter European right-wing populist parties

European right-wing populism is a widely studied phenomenon in recent years. At the same time, many fact-checking projects have been launched with the purpose of assessing statements from the most relevant social actors. The role of fact-checkers is growing, but there is scant literature on their agenda. In this study, we investigate the communication strategies on Twitter of European right-wing populist parties and their relationship with the agenda of fact-checking initiatives in Germany, France, Spain and Portugal. Based on a content analysis of tweets covering political content ( n = 4212), we analyze not only the agenda but also the use of propaganda mechanisms and the scope of the tweets. The results show how the agenda of right-wing populism was composed of ideological thematic issues. Fact-checkers focus on competitor leaders and generate lower interaction. These findings contribute to increasing research on both actors, arguing that the focus on political leaders impacts on fact-checking.