Based on a survey of 139 people, all bureau chiefs in Washington under a Democrat president. Oh, and the actual survey was performed and published by a reporter for the Chicago Tribune who later wrote a biography of John McCain.
I'm sure there was no selection bias involved. As opposed to:
The survey conducted by the Pew Research Center isn't based on a select subset, specifically the 139 people who were comfortable admitting their political affiliation while working in Washington under a Democrat president. Don't get me wrong, the results still show the press leans left, like I said, but it's not some ridiculous nine to one ratio of democrats to republicans in the press, as you seem to think. I'm sure if you try hard enough, you can find a survey of a different hundred people in the press all claiming to be Republicans, or you can make one yourself just go to their national convention and ask everyone wearing a noticeable amount of red. If you look at the numbers and the source, then apply some common sense, it doesn't seem so realistic anymore does it?
There is always obvious bias in the media to anyone who isn't happy about something. It's not surprising, everyone has an opinion, nobody wants to get up and report that they were or are probably wrong, so they lean to their own side. If you recall, under the Bush administration the press was repeatedly telling us it's unpatriotic to not have faith in our president, that he was democratically elected and we need to respect that. It wasn't from everyone, but at the time, it was one of the dominant messages of the time, along with the idea that if you don't support the war you don't support the troops. Now, under Obama, it looks like they're all democrats, largely defending his actions until they just can't figure out how to anymore. It's a more complicated mess, spying on our own people, but I wouldn't say lying to all of us about why we were sending our soldiers to war is any better, in both cases I wish they'd be straight with us.
Yes, the media is biased, everyone is to some extent. Is it really evident in the reporting as much as it appears in these surveys though? I've read numerous articles stating CNN needs to go all the way and become the Fox News for Democrats, that they already show obvious bias and it'd help the party. While it's disturbing to think that CNN is so bad, it suggests they're further left than any other network and still can't keep up with the obvious and undeniable bias of Fox. My advice? Take in as much as you can and try to figure it out for yourself. Pick your battles, there's too much going on to try to follow everything while having to sift through the bullshit, sad but true, most of us don't have the time. Don't get duped by some twisted little survey like this.