1) It's undeniable that Republicans have been complaining about this shit. It's also something not everyone agrees happens at the level of the complaint. So "perceived" seems like an accurate description of the situation.
2) There's mention of a "strangehold" on journalism from Democrats which is exactly one of the sorts of complaints I was mentioning: but it's also one that seems no truer today than it was when I was hearing it on radio stations 25 years ago. Mainstream media personalities complaining that no personalities like themselves existed in the mainstream media. From Rush on the radio then to today's wave either on cable TV or online, the song remains the same. This is why personally I think the claims of persecution is wildly overblown.