Sounds like they are WAY too late to the party. The only thing they can hope to do is plant a few moles in FOX, have them do some seriously bad journalistic malpractice and then amplify it.
I imagine Juan Williams, a recent Fox acquisition from National Proletarian Radio, might be a candidate for mole, but there are several problem with moles.
1. They are uncontrolled. They live in enemy territory.
2. They are unprotected. They live in enemy territory.
3. They can be secret only so long as they are not activated.
4. they can be activated, but then they are no longer secret.