From Fox News to Rush: Secrets of the right’s lie machine - Salon.com
In the late 1980s, conservatives moved from criticism to participation with the aggressive creation of right-wing partisan media. The first decisive move came with AM talk radio. The elimination of the Fairness Doctrine (which required that a broadcaster provide two sides to controversial political issues) and the relaxation of ownership rules such that a handful of companies established vast empires opened the door to a tidal wave of hard-core right-wing talk-show hosts. By the first decade of the century, the 257 talk stations owned by the five largest companies were airing over 2,500 hours of political talk weekly and well over 90 percent was decidedly right wing.