Is or should be their main editorial goal to exactly mirror the political affiliations of americans? Is that the issue Berliner was raising in his essay? I did

Is or should be their main editorial goal to exactly mirror the political affiliations of americans? Is that the issue Berliner was raising in his essay? I didn't read it that way, and I do find this relevant to the points he was making, which were much more about journalistic practice and ethics than about the demographics of listeners per se.