If you ask the folks over at the CNN political blog I'm sure they would explain how there blog does not have a bias. But in reality CNN is a left leaning news outlet. Like most news sources they have some kind of agenda or purpose. The purpose seems to be to paint Mr. Obama in a more positive light then the other GOP candidates. The big news on other news sights was how Obama "broke" his promise of reducing the dedicate by 50% by the end of last year, but this was not mentioned at all on the CNN political blog. It seems to me that CNN does appeal more the left-ist followers of political news. The blog generally seems to post in the same style. It will include a few images with a semi-short article with an occasional video.