The real issue here is that people out there see this as a problem. Like “man, FOX is the only network going to bat for the poor Republicans!” Good strategy, though: make up a problem and then fight it to the death. It helps insulate them from criticism of rightward leanings by letting them say “we’re the only network defending the GOP!”
He’s right, though. If Ailes doesn’t support a candidate, they’re dead in the water. There’s no equivalence on the left, from any network.