I wish people would stop calling CNN liberally biased. They're one of the more fair channels actually. A lot of articles, including the one on the subject at hand, are written without any slant. Just pure facts, especially when covering live. If there is an opinion, they say "In my opinion" and keep it short. I watched coverage of the gay marriage celebration and President Obama singing for hours (plane flight, only a few free channels), and I was impressed at how unbiased it all was.
Honestly, I'm beginning to think networks become "liberal" as soon as they don't tow the exact party line of the more far-right conservatives.