As I have said, we are working on this. We are in the final stage of a massive study looking at editorials of five major papers from 1958-1970, using accepted (even by libs) methods of phrase/word analysis to identify markers of change.
We also plan to contrast this as a variable with national opinion polls/voter stats.
Read Neal Gablers book...... "An Empire of Their Own : How the Jews Invented Hollywood".
You will see how much of what particular psychological and financial needs of some immigrants created the immense power of left media. It goes way back.
The media..... nearly all of it today in America......... is really basically an lefty/socialist oligarchy.
[Think Tank Citations as] A Measure of Media BiasPardon my cynicism, but I don't see how anything will change the fact that journalism has the propaganda power and the motive to declare itself "ojective," and also has the power and the motive to declare all other institutions to be potentially or actually corrupt in comparison with journalism.
Nor do I see any end to the tendency of opportunists to become politicians, call themselves "liberals" or "progressives," and simply say things to please negative, superficial, unrepresenative journalists.