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This paper surveys the existing literature on the sub-state perception of and mobilisation on the Regional Policy, the most comprehensive policy of the European Union oriented towards regional development. Focusing on regionalist parties, regional administrations and the regional public, it summarises and structures key empirical and theoretical knowledge on how the Regional Policy impacts these actors’ EU support. To redress the omissions identified, this paper suggests ― against the background of the emerging research challenges related to the current turbulent developments within the European Union ― several avenues for future research through a refined analytical framework.