All the media outlets are owned by or partnered up with other organizations that tend to have an agenda.
NBC is owned by GE. GE wants obama to implement Cap and Trade so they can profit like they did in the 90s. NBC is their megaphone.
CNN is headed by liberal Ted Turner. He's a little wierd and has his own agenda.
CBS has been infiltrated by left wing conspiracy theorists and has a bad rep when it comes to honest reporting. Rather is a liberal guy as well. And Katie Couric is a regular on Huffington Post, a progressive and mean website that talks of killing republicans and generally hates opposing commentary.
ABC chose to send Charlie Gibson in to play "Gotchya" with Palin. Expecing a candidate to know everything about everything is retarded. Whether you like her or not, the interviews were BS.
Fox has been consistently considered a conservative network. They employ a wide array of people who disagree with the anchors and commentators, so it balances them out. They are stepped on by other news outlets because they havent been standing in line to suck obamas balls, so they must be evil. They, too, are owned by a large company. Their other outlets are far left as well. Fox's broadcast programming consistently bashes the right and has portrayed republicans as Nazis. Their European counterpart, SKY news has consistently leaned left as well.
So, we have 1 network that tends to lean center-right, and all the others lean left to far left.