[Kleon]

Those are some good points, thanks for responding. I guess I still haven't seen evidence that supports the claim that the media willfully shape the opinions of the population through manipulation of the facts. I don't know too much about journalistic routine, but I would imagine the most important figure would be the political affiliation of news editors and directors, since they have control over the news agenda, which becomes public agenda.

[Lady Heron]

but I would imagine the most important figure would be the political affiliation of news editors and director

Sadly it is just a bad if not worse. There are studies done on this subject. You might be able to find it on the web, though I am not sure how to go about researching it.