The European Union remains an ambivalent polity. This uncertainty complicates the assessment of its democratic and federal quality. Drawing on comparative federalism research can contribute not only to making sense of whether, or rather which kind of federalism the EU has developed. It can also enable addressing such a compounded, but necessary inquiry into the federal and democratic character of the EU and how to ascertain which type of democratic government for which type of federal union may be appropriate. The article first elaborates a framework to assess the dimensions of federal and democratic government, drawing on comparative federalism research to delineate basic types of federal democracy. Here the democratic dimension of government is taken as referring primarily to the horizontal division of powers (among ‘branches’) of government, the federal dimension to the vertical division of powers (among ‘levels’) of governments. The framework is applied to the government of the EU in order to gauge its own type(s) of division of power arrangements and the interlinkage between them. Finally, the discussion reflects on whether or rather how the EU could comprise a federal democracy, especially in light of recent crisis challenges and subsequent institutional developments in EU governance.