https://www.theatlantic.com/international/archive/2017/02/what-is-populist-trump/516525/
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No definition of populism will fully describe all populists. That’s because populism is a “thin ideology” in that it “only speaks to a very small part of a political agenda,” according to Cas Mudde, a professor at the University of Georgia and the co-author of Populism: A Very Short Introduction. An ideology like fascism involves a holistic view of how politics, the economy, and society as a whole should be ordered. Populism doesn’t; it calls for kicking out the political establishment, but it doesn’t specify what should replace it. So it’s usually paired with “thicker” left- or right-wing ideologies like socialism or nationalism.
Populists are dividers, not uniters, Mudde told me. They split society into “two homogenous and antagonistic groups: the pure people on the one end and the corrupt elite on the other,” and say they’re guided by the “will of the people.” The United States is what political scientists call a “liberal democracy,” a system “based on pluralism—on the idea that you have different groups with different interests and values, which are all legitimate,” Mudde explained. Populists, in contrast, are not pluralist. They consider just one group—whatever they mean by “the people”—legitimate.
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“[P]opulists only lose if ‘the silent majority’—shorthand for ‘the real people’—has not had a chance to speak, or worse, has been prevented from expressing itself,” explains Jan-Werner Müller, a professor at Princeton University and the author of What Is Populism? “Hence the frequent invocation of conspiracy theories by populists: something going on behind the scenes has to account for the fact that corrupt elites are still keeping the people down. …
f the people’s politician doesn’t win, there must be something wrong with the system.”
One might expect this argument to fail once populists enter government and become the establishment. But no: Populists—ranging from the revolutionary socialist Hugo Chavez in Venezuela to the religious conservative Recep Tayyip Erdogan in Turkey—have managed to portray themselves as victims even at the height of their power, blaming their shortcomings on sabotage by shadowy domestic or foreign elites.