This article investigates the effect of local economic conditions on voting behavior by focusing on the export-oriented agricultural areas of Argentina during the commodities boom. It assesses the marginal effect of export wealth on electoral outcomes by studying the impact of soybean production, the main Argentine export product during this period. The combination of rising agricultural prices and a salient national tax on exports allows us to evaluate how wealth and tax policy shape local electoral behavior. This study relies on a spatial econometric analysis of the vote across Argentine departments for the 2007–15 period, along with qualitative evidence from interviews and a descriptive analysis of government appointments.