Leading theories of local responses to immigration claim that ideology drives policy differences. However, these studies focus exclusively on policy adoption, neglecting whether or not ideological preferences also govern the extent to which local actors choose to cooperate with federal immigration initiatives. To account for this shortcoming, I use zero-inflated negative binomial regression to assess county-level deportations resulting from local participation in the Secure Communities program. I find that existing financial and structural resources as well as financial incentives are strong determinants of county deportation levels. Furthermore, there is no evidence to suggest that conservative counties produce more deportations. Instead, the size of a county’s policing budget moderates the relationship between ideological orientations and deportation outcomes. With federal-local policy partnerships on the rise, these findings provide an important foundation for developing a better framework to understand the implications of such partnerships for policy implementation. In short, this article suggests that although policy adoption may be a politicized process, local compliance with federal initiatives is highly dependent on the resource constraints and incentives of the actors involved.