Partisan differences in interdependent campaign messaging

Political language can serve as a powerful tool for mobilizing and uniting voters. The present work examines partisan differences in the use of interdependent language—language that emphasizes connection, collective goals, and cooperation—in US Congressional campaign emails during the 2024 general election. Using computerized text analysis (LIWC), we analyze over 15,000 emails from 378 Senate and House candidates to assess the prevalence of interdependent language, as measured by first-person plural pronouns, references to affiliation, and social language. Our findings suggest that, on average, Democratic candidates employ significantly more interdependent language than their Republican counterparts. However, we observe pronounced shifts in this pattern over time, with Republicans' use of interdependent language increasing to match Democrats as Election Day approaches. Given prior evidence that framing issues in interdependent terms can foster cooperation and collective action, understanding how political candidates engage with the language of interdependence can provide insight into the rhetorical tools used to rally support and motivate political engagement.