A growing percentage of international aid is distributed through local nongovernmental organizations (NGOs). Scholarship is divided on how that aid affects domestic politics. One side argues that aid to NGOs reinforces the status quo. As NGOs become dependent on external funding, they lose sight of their original goals. The other side contends that channeling funds to NGOs generates associational activity; producing political change by empowering previously marginalized groups. We test these competing hypotheses in Rondonia, Brazil, measuring the impact of internationally funded NGO activity on voting behavior. We find that the impact of aid varies with the institutional environment. At the state level, more votes for the conservative governor came from municipalities whose NGOs received project money. In contrast, the same municipalities registered a significant shift to leftist candidates at the presidential level. The findings have broad implications for the impact international aid has on political competition, political change, and democracy.