The evidence on this point is not as definitive as one might like, but what we have – for example, from the work of Princeton University’s Larry Bartels – suggests that over the past 50 years, virtually the entire US political elite has stopped sharing the preferences of low- or middle-income voters.
Sur ce point ses arguments ne sont pas aussi totalement convaincants qu'on le souhaiterait, mais considérons par exemple le travail de Larry Bartels de l'université de Princeton.