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287(g) and the Politics of Interior Immigration Control in the United States: Explaining Local Cooperation with Federal Immigration Authorities

This paper aims to improve our understanding of emerging patterns of interior immigration control in the United States by examining local law enforcement cooperation with federal immigration authorities under the 287(g) Program. While several recent studies have drawn attention to the shifting terrain of immigration enforcement away from borders into the interior, few have attempted to systematically explain reasons for this shift. Using a county-level dataset of all counties in the United States, this study finds that, despite the purported links between the 287(g) Program and public safety, county crime rates are not significantly related to local cooperation with federal immigration authorities. Rather, the results indicate that local decisions to engage in immigration control efforts are driven by political factors, particularly a county's partisan composition, and demographic pressures related to increases in the Hispanic/Latino population. Demography is not, however, destiny, as new immigration in localities with established foreign-born populations does not significantly increase the likelihood of cooperation under 287(g). This suggests that the partisan composition of the places where immigrants settle mediates the extent to which the demand for tighter immigration enforcement exceeds the political influence immigrant communities have in their efforts to contest restrictive immigration control policies.