This essay contributes to developing a new approach to political legitimacy by asking what is involved in judging the legitimacy of a regime from a practical point of view. It is focused on one aspect of this question: the role of identity in such judgment. I examine three ways of understanding the significance of identity for political legitimacy: the foundational, associative, and agonistic picture. Neither view, I claim, persuasively captures the dilemmas of judgment in the face of disagreement and uncertainty about who “I” am and who “we” are. I then propose a composite, pragmatic picture. This view casts the question of political legitimacy as an existential predicament: it is fundamentally a question about who you are—both as a person...