http://www.amazon.com/Cable-News-Confidential-Misadventures-Corporate/dp/097606216X/ref=pd_bbs_sr_1/104-3074887-2590316?ie=UTF8&s=books&qid=1177590156&sr=1-1...and Jeff Cohen (founder of Fairness And Accuracy In Reporting (FAIR)) wrote a book of what it looked like from the inside at MSNBC and how they were ordered to slant thir guest lists in a rightwing fashion.....
There is no "liberal media". It's a fiction, a strawman argument, created by the rightwing to use as a scare tactic used to intimidate.....to keep people in a box, a control mechanism, to poo poo damaging stories about them as not being credible...
Why?
Because the "news divisions" have the potential to tell people the truth and thus are a threat to those who have other intentions....