Lobbying and policy conflict: explaining interest groups’ promiscuous relationships to political parties

Do interest groups prefer to interact with party political supporters or opponents, and why do they do so? Recent research has provided different explanations and mixed findings for this question, highlighting the role of institutional contexts and differences between interests. Here, we focus on the effects of issue-level factors instead. We hypothesize that higher levels of conflict lead interest groups to lobby both supporters and opponents. Our argument emphasizes that the reason to do so lies in interest groups’ desire to gain or maintain prominence within a policy subsystem, rather than in persuasion attempts. Analyzing quantitative and qualitative data on the lobbying targets for 80 Dutch interest groups on more than 300 issues, we find support for our theoretical claims. When the level of conflict is high, prominence often trumps persuasion. These findings suggest that interest groups, by contacting many different parties, can contribute to policy making in positive ways.