I wouldn't say most networks blatantly lie and manipulate data in order to achieve some liberal media agenda. Given our rapid news cycle and abundance of sources, it would be pretty stupid to try and fool people in such an obvious way when someone will easily prove you wrong.
That said, liberal media bias comes in other, more subtle forms. One of the more obvious ones is how some networks make sure you know when it's a conservative/Republican in trouble, but seem not too keen on letting you know when it's a Democrat. An example:
Rep Anthony Weiner: The Picture Was Me And I Sent It. Notice how nowhere in that story do they directly mention he's a Democrat. They don't put "Rep. Anthony Weiner (D-NY)" once. The only time they mention it is in this otherwise flattering paragraph:
Broussard's story had threatened to expose the secret online life of one of the House Democrats' most popular members, and a man many considered a leading candidate for mayor of New York City.
On the other hand, they make sure to note that Andrew Breitbart is a "conservative blogger":
Broussard said she confided about her experiences with several close friends, including one with Republican political ties. The man, whom she declined to identify, encouraged her to share her story with Matt Drudge and conservative blogger Andrew Breitbart.
Now, I just randomly Googled "abc" and "Anthony Weiner" to find that story. When I Google "nbc" and "Anthony Weiner", I found this:
New York Rep. Anthony Weiner Resigns. Again, note how they never quite associate his name with Democrats except in passing:
In part, that echoed what party leaders have said for days as they pressured him to resign so Democrats could resume positioning themselves for the 2012 election campaign without constant criticism from Republicans on moral grounds.
And again, the only time they do note he's a Democrat is when they're otherwise kissing his ass:
The Democrat's decision to leave Congress marks at least an ignominious pause if not an end in a once-promising career. Weiner ran for New York mayor in 2005, and had talked of seeking the office again.
Oh, and let's not forget to point out "conservative commentator" Andrew Breitbart:
Weiner's problems began on May 28 when BigGovernment.com, a website run by conservative commentator Andrew Breitbart, posted a lewd photograph of an underwear-clad crotch and said it had been sent from Weiner's Twitter account to a Seattle woman.
Two different networks, two random articles, both doing the same thing. It's obvious there's some liberal media bias going on. If I didn't have to go to work, I'd come up with more examples. But I think that'll do for now.
