I don't how drastically things have changed in recent years. But entities like Fox and CNN are basically cable as opposed to stations that air programs from say CBS, NBC, Fox (local stations, the Simpson, NFL games) over the air. FCC regs at one time regulated what they considered "offensive" content like nudity and profane language. Cable isn't covered legally if I remember correctly.
Going back to the dark ages, Morning Zoos walked a finer line than say shows on satellite stations like XM and Sirius.