Liberal Media Bias -- You’ve probably heard it used to describe the American main stream media hundreds, if not thousands of times. One of the most often made claims of the right-wing messaging machine is that the mainstream media are composed almost entirely of liberals who work in concert to promote progressive viewpoints and elect Democrats, while portraying conservative viewpoints, Republicans, and the Tea Party AstroTurf movement with contempt.
Liberal Media Bias is a useful red herring, in that it fires up the faithful conservative base and provides a convenient scapegoat for when the American public rejects conservative policies and/or politicians. Right wing political pundits regularly regurgitate the term to bully the main stream media into giving evermore air time and print space to conservative messaging, without ever questioning it’s authenticity or reporting alternative viewpoints
Pew's Excellence in Journalism study found a marked conservative bias in coverage the main stream media has given to the presidential candidates over the past five months. The American press gave Pres. Obama unremittingly negative press by a four to one margin, while giving Republican candidates extremely positive press coverage.