We estimate the effects of the introduction of a large cash transfer program on support for the ruling populist party in Poland. We exploit the variation at the municipal level in the annual cash transfer amount received per capita, and use a difference-in-differences research design to study the electoral effects of the transfer. Our results show that a cash transfer amount of $100 per capita translated into an increase in the vote share for the ruling party of nearly two percentage points. We also find that these effects were largely due to the recruitment of previously non-voting individuals. We conclude that without the transfer program, all else being equal, the populist party would not have remained in power.