My guess is intimidation. The left has been trying to silence political desent (only against the left) for years.
Political correctness was designed to silence all opposition to the left wing agenda and it's special interest groups.
Notice who's "protected" and who is not. Name one right wing issue or group that protected by political correctness. Now name one left wing issue or group that isn't!
It’s not just CNN vs. Fox News.
It’s CNN vs. ESPN, Lifetime, TBS, or Jerry Springer on a local station. Why are they choosing CNN out of 145 channels?
I presume they are getting paid so that CNN does not drop totally out of the ratings. Or at least I think you’d have to pay someone to get them to watch CNN these days.