The right to vote has always been the central privilege of citizenship. Its extension to resident migrants holds a promise of democratizing citizenship by bringing it closer to principles with deep roots in liberal and republican traditions, and further away from particularistic understandings that reduce citizenship to nationality. This article's main contribution is a systematic and policy-relevant discussion of the kind of enfranchisement that can realize that potential, approached in three steps: first, a demarcation of citizenship policy within migration policy substantiates the need to employ a normative perspective; second, a description of the trend of enfranchisement of non-citizens provides the normative paper with a sound empirical base for a non-ideal discussion; third, a discussion of different kinds of enfranchisement tackles the controversial issues related to it and delineates the specific requisites to realize its potential.