Drawing on Judith Butler’s work and a series of studies associated with actor–network theory (ANT), this paper engages with political agency through the concept of performativity. Based on the empirical analysis of a hunger strike that took place in Brussels in 2012 and involved 23 illegal immigrants, we aim to achieve three things. First, we foreground physical bodies as political entities caught up in multiple modes of doing politics. Second, we show how such modes relate to one another, reinforcing citizenship, activism and party politics as specific performances of agency associated with liberal democracy. Finally, we argue that the Brussels hunger strike also challenges these performances by failing to meet certain expectations about what it is to be political/act politically. As the European refugee crisis is generating louder and louder voices, hunger strikes sensitise us to modes of doing that work by becoming passive, silent, weak and vulnerable. Such processes, we suggest, expand the standard repertoire of modes of doing and may refigure our understanding of the interaction between transnational and liberal democratic politics—in International Relations, ANT and beyond.