A perceptive essay by George Packer in the Atlantic examines political language, particularly that of Trump and contrasts it with the language currently used by progressives.  Some insights:

The strength of Trump’s populist language lies in its openness. It requires no expert knowledge and has no code of hidden meanings. It’s attuned to some of the strongest currents in American pop culture, and it gives rise almost spontaneously to memorable slogans—“Build the wall,” “Lock her up,” “Witch hunt,” “No collusion,” “Make America great again.” It’s the way people talk when the inhibitors are off. It’s available to anyone who’s willing to join the mob. 

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By contrast, the language of the contemporary left is anti-populist. Its vocabulary, much of it taken from academia, is the opposite of accessible—it has to be decoded and learned. Terms such as centered, marginalized, intersectional, non-binary, and Eurocentric gender discipline separate outsiders from insiders—that’s part of their intent, as is the insistence on declaring one’s personal pronouns and showing an ability to use them accordingly. Even common words like ally and privilege acquire a resonance that takes them out of the realm of ordinary usage, because the point of this discourse is to create a sense of special virtue. Many of these changes happen by ambush—suddenly and irrevocably, with no visible trail of discussion and decision, and with quick condemnation of holdouts—which gives them a powerful mystique.

The language of the left creates a hierarchy of those who get it and those who don’t. Mastering the vocabulary is a way of signaling entry into a select world of the knowing and the just. The system is closed—there’s an internal logic that can be accepted or rejected but isn’t open to argument or question. In this sense, though much of the language of the left has academic origins, its use in the public square is almost religious. The abandonment of language that brings people in rather than shutting them out is one of the left’s many structural disadvantages in American politics today.