Campaign Advertising: Partisan Convergence or Divergence?

Abstract

Prior research demonstrates that many citizens are unable to perceive differences between the two major political parties. In order to investigate whether candidate behavior in campaigns contributes to this perception, we test implications about partisan constraints on campaign rhetoric drawn from the literature on parties and policy convergence. Our results suggest that candidates of different parties do not highlight the same issues or positions in their campaign advertising. We find that campaign rhetoric is strongly motivated by party even when controlling for constituency characteristics and other factors. Thus, there is convergence among candidates of the same party across districts and states and divergence between opposing candidates within districts and states. Our results are based on a detailed content analysis of more than 1,000 campaign advertisements aired by 290 candidates in 153 elections in 37 states during the 1998 midterm elections.