Plenty of public argument ensued about the validity of the underlying data. But there was hardly any comprehension among experts about why moral support for democracy might be eroding — in part, because there's good reason to think that experts are themselves to blame.
This is most obvious in the case of Trump, who devoted a large share of his presidential campaign not just to attacking democratic norms but also to attacking the technocratic experts who have come to symbolize democracy in the United States.
I have no sympathy for Trump's repulsive disregard for facts, truth, and legitimate expertise. Yet he was canny in identifying how both parties' technocratic mindset — their approaching every problem with a five-point plan designed to produce evidence-based deliverables — had left democracy vulnerable. Trump knew that if he waged a war on democratic values, the technocrats who now monopolize the country's political elite would be incapable of fighting back.