For the record, Fox News is a separate channel from the Fox network. Fox News is a 24-hour news channel like CNN whereas the Fox network basically only produces prime-time TV shows for its local affiliates to show, like ABC, NBC, and CBS. (Although they do a little more than what Fox does. Namely, they also have some non-primetime shows that they distribute to affiliates, like 30-minute national news programs and morning shows. In particular, Fox has no news programs, although the local affiliates might, and they can use Fox News as a wire service of sorts.) So your notion that already having those other networks makes it not much of a step is probably not correct. Saying that you already have CNN and MSNBC would be more important.