Temporary migration raises two different challenges. The first is whether territorial democracies can integrate temporary migrants as equal citizens; the second is whether transnationally mobile societies can be organized democratically as communities of equal citizens. Considering both questions within a single analytical framework will reveal a dilemma: on the one hand, liberals have good reasons to promote the expansion of categories of free-moving citizens as the most effective and normatively attractive response to the problem of partial citizenship for temporary migrants; (...) yet, on the other hand, if free movement rights were actually used by too many, this might fatally undermine the sustainability of intergenerational and territorial democratic polities. (shrink)