National labor unions in the United States have formally supported undocumented immigrants since 2000. However, drawing on 69 interviews conducted between 2012 and 2016 with union and immigrant rights leaders, this article offers a locally grounded account of how union solidarity with undocumented immigrants has varied notably across the country. We explore how unions in San Francisco and Houston have engaged with Obama-era immigration initiatives that provided historic relief to some undocumented immigrants. We find that San Francisco’s progressive political context and dense infrastructure of immigrant organizations have enabled the city’s historically powerful unions to build deep institutional solidarity with immigrant communities during the Deferred Action for Childhood Arrivals (DACA [2012]) and Deferred Action for Parents of Americans (DAPA [2014]) programs. Meanwhile, Houston’s politically divided context and much sparser infrastructure of immigrant organizations made it necessary for the city’s historically weaker unions to build solidarity with immigrant communities through more disparate channels.

自2000年以来，美国全国工会正式支持无证移民。但是，根据2012年至2016年对工会和移民权利领袖进行的69次访谈，本文提供了一个本地化的说明，说明工会对无证移民的团结如何显着变化全国各地。我们探索旧金山和休斯顿的工会如何参与奥巴马时代的移民计划，这些计划为一些无证件移民提供了历史性的救济。我们发现，旧金山的进步政治环境和密集的移民组织基础设施，使得该市历史悠久的工会在“推迟儿童到达行动”（DACA [2012]）和“美国父母推迟行动”期间与移民社区建立了深厚的机构团结感（ DAPA [2014]）计划。同时，休斯敦政治上的分歧和移民组织的基础设施稀疏，使得该市历史上较弱的工会有必要通过更多不同的渠道与移民社区建立团结。