This became very obvious when the "leadership" started discussing instituting the "fair doctrine" rules. What bothered them is that liberal talk shows mostly failed, while conservative talk shows flourished.
Then there was the case of the commentator (Juan Williams) who was on both NPR (public funding involved) and Fox. He stated an opinion on a Fox show and was fired from NPR. He has given opinions on his NPR show that some executives at Fox Network likely didn't agree with, but, unlike the liberal left, Fox must have felt he actually had a right to say what he thought. Imagine that.
I am only familiar with the Mallard Fillmore comic strip. I don't think I have ever seen or heard its author, but apparently he too ran afowl (pun intended) of a left-leaning boss. I sincerely hope he can continue the strip. After all, Doonesbury has been running for years, but I guess it's okay since it leans in the correct direction.