Does Money Buy Congressional Love? Individual Donors and Legislative Voting

Despite the popular belief that campaign contributions affect policymaking, study after study has suggested that legislative voting is unaffected. We reexamine this question by focusing on the increased dominance of individual contributors. Using data on roll calls associated with the Congressional Cooperative Election Study, we test for senators’ responsiveness to their parties’ national donor class. Several findings emerge. First, responsiveness to national donor opinion is significant, even controlling for the effects of in-state constituents, affluent citizens, activists, senator ideology, and a senator’s personal donors. Moreover, the results hold in specifications that account for the endogeneity of national donor opinion to legislative votes. Second, and consistent with scholarship that argues fundraising is increasingly important for party leadership positions, the relationship depends on the ideological favorability of a state to a senator’s reelection. Also consistent with this perspective, responsiveness to donors is unrelated to a senator’s wealth, time to reelection, or seniority.