This article examines the Social Democratic Party of Germany’s (SPD) approach to immigration and the role of party activists in shaping its policies. The article delves into the party’s response to the 2015 refugee crisis and its aftermath, utilising the discourse taken by the party’s leading figures and interviews with party elites, exploring their perceptions of activists and their constraints on immigration policies. The findings reveal that the influence of party activists is beyond their official power within the organisational structure, and their nestedness within the party affects the party elite’s policy- and decision-making on immigration. Given the potential backlash from activists, the study underscores the party elites’ cautious approach to policy shifts and emphasises the significance of leadership skills, the party’s image and electoral motivations in navigating intra-party dynamics and policy-making. Ultimately, the research highlights the delicate balance SPD elites seek in addressing immigration issues within its party structure.