About Emotion-drive politics

Byung-Chul Han and other authors have pointed out that political discourses are undergoing a transmutation from the style prevailing in the 1980s to the current one, where post-truth, emotion and social networks seem to have changed the strategies and discourses of political organizations.

Beyond opinions, I would like to know what quantitative work has been carried out by political scientists to confirm or disprove this type of reflections?