If you want see a textbook example of media bias, check out these two headlines.
The Center for Public Integrity is a liberal advocacy group funded by George Soros. Why not mention CPI's funding source? I would certainly argue that Soros's group is much more partisan than any study conducted by ASU. Yet the Republic attempts to rebut the ASU story by trying to establish a tenuous connection to Koch--while at the same time never mentioning Soros.
Notice two other extraordinary things. First, USA Today, simply printed the Center for Public Integrity story...it's not a story about the study. CPI actually wrote it. It's not really an article as much as it is a paid advertisement. At a minimum, it's an OP ED piece and should be clearly identified on the opinions page.
Now notice what the paper calls this opinion piece. It's an "Investigation." Really? "Investigation", "partisan hit piece"..tomato tom-ah-to, whatever. Here's a good example of how reporters are flogging the phony "investigation" theme.