 The second, horizontal dimension distinguishes the predominantly left-wing from the predominantly right-wing populisms and leaves a place for a centrist populist option. Take classical strong ethnic nationalism. The relation between right-wing populism and such a nationalism is very tight. This has led some theoreticians (Taguieff 2015) to present “nationalist populism” as the only kind of populism. The term captures exactly the synthesis of populism and the strong ethnic nationalism or nativism. From populism, it takes the general schema of anti-elitism: the leader is addressing directly the people and is allegedly following the people’s interest.  From nationalism, it takes the characterization of the people: it is the ethnic community, in most cases the state-owing ethnic community, or the ethno-nation. In his work, Mudde documents the claim that purely right-wing populists claim to represent the true people who form the true nation and whose purity is being muddied by new entrants. In the United States, one can talk about populist and reactionary movements, like the Tea Party, that have emerged through the recent experience of immigration, terrorist attacks, and growing economic polarization. We have to set aside here, for reasons of space, the main populist alternative (or quasi-alternative) to national populism. In some countries, like Germany, some populist groups-parties (e.g., German AfD party (Alternative for Germany)), appeal to properties much wider in their reach than ethno-national belonging, typically to religious affiliations. Others combine this appeal with the ethno-national one. This yields what Riva Kastoryano (2006) calls “transnational nationalism”.