"The growing success of populist parties in western democracies has generated lively academic debate surrounding the changes this populist wave has created in various political systems. These parties have demonstrated their ability to shift from protest to governing parties, consequently shifting experts' attention toward the effects of populism in power on democratic institutions. In light of examples in South America and Easter Europe, scholarly debate has centered on concerns that populist governments will deform democracy and democratic institutions, limit institutions and reduce both checks and balances and pluralism. Here we argue that in the context of a consolidated western democracy, populist governments identify themselves with government ‘as usual', and that the populist ascent produces a greater impact on the political system as a vehicle for protest than it does on institutions once in power. We analyze the three examples of populism represented by the 5 Star Movement, Podemos and La République En March in order to examine the transformations produced by their successes in their relative political systems and their various effects on institutions once in government."

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