Party influence where predispositions are strong and party identification is weak: Assessing citizens’ reactions to party cues on regional nationalism in Spain

I show that parties’ positions on issues that are rooted in identity influence people’s opinions even if they lack a party identification. When exposed to competing party positions, citizens adjust their issue opinions to make them more consistent with their preferred party’s position even if they do not identify with that party. In two experiments conducted in Spain, I consider how citizens react to party cues on regional nationalism. Study 1, a laboratory experiment in Catalonia, shows that, when exposed to party cues on nationalism, citizens change their issue opinions in the expected direction but only weakly change their party evaluations. Study 2, a survey experiment in Galicia, shows that party cue effects only occur when participants are exposed to competing cues from their preferred party and from a disliked party. Parties thus influence opinions when they adopt contrasting positions even on issues that are rooted in identity