The rise of right-wing populism has provoked a variety of responses. This chapter engages with one such response: Chantal Mouffe’s ‘left populism’. Mouffe’s call for an anti-essentialist, agonistic politics that can shift away from the ‘common sense’ of neoliberalism and reactionary nationalism which underpins right-wing populism is welcome. And yet our concern is that it risks being trapped by its reification of the nation-state. It may also miss the international dimensions of right-wing populism, including how forms of relation between states and corporations figure in its rise and stabilisation. We explore an approach which does not locate politics primarily as a fight over control of the identity and institutions of the state, but which begins in transnational resistance and collective action. We take up Featherstone’s account of transnational solidarity to frame a study of resistance to the Adani conglomerate. In our argument, this can be understood as an example of collective action not reliant on pre-existing (national) identities. Drawing on Featherstone’s account of solidarity as a lens invites us to consider whether transnational practices which decentre the state may offer resources to tackle the international aspects of populism’s rise, and the company-state nexus central to right-wing populism.