Study Reveals How House Members Use Campaign Contributions to Shape Internal Party Power

Researchers at the University of Southern California analyzed seven election cycles of member-to-member campaign contributions in the U.S. House of Representatives, treating the data as a network to identify broad patterns. Party leaders — including speakers, whips, caucus chairs, and committee chairs — gave to fellow members at notably higher rates than non-leaders, with figures like Steve Scalise contributing to 192 colleagues and Hakeem Jeffries to 76 in the 2021–22 cycle alone. Kevin McCarthy's Majority Committee PAC reportedly directed roughly $4 million to vulnerable House Republicans in that same cycle. Democratic contribution networks proved relatively stable and centralized over the study period, while Republican networks shifted from a centralized model toward more dispersed, cluster-based giving patterns. The study also found that members targeted by heavy super PAC spending were more likely to receive internal party contributions and less likely to give, suggesting outside spending acts as a public signal that redirects internal resources toward competitive races. The researchers emphasize that these internal flows, though a small share of total campaign spending, reveal how parties strategically protect vulnerable members and reinforce hierarchies of influence.