It's not an opinion; it's a fact. CNN (TV) appears left of center and at the bottom end of reliable, as I explained in my first post. Newsweek appears slightly left of center, less reliable. It might help to enlarge the chart and check the axes along the left and top. The chart is updated regularly, and I've noticed certain media sources drifting left over the last few years, like AP. You'll notice Fox News Rundown is considered reliable, though skewing heavily right.
You may want to also dig into the interactiver version
here, where you can drill down and see how certain ratings are justified. The whole page is a very worthwhile resource.
As a result of this thread, I've added
themedialine.org to my reading. It focuses on the news in the Middle East, leaning center or slightly right with a high degree of accuracy.