Will does a good job of covering the history of the fairness doctrine. A quick review of this sordid chapter in US history and the fact that many Democrats would like to bring it back today gives some instruction on just how hard it is to have freedom of speech!
Because liberals have been even less successful in competing with conservatives on talk radio than Detroit has been in competing with its rivals, liberals are seeking intellectual protectionism in the form of regulations that suppress ideological rivals. If liberals advertise their illiberalism by reimposing the fairness doctrine, the Supreme Court might revisit its 1969 ruling that the fairness doctrine is constitutional. The court probably would dismay reactionary liberals by reversing that decision on the ground that the world has changed vastly, pertinently and for the better.
Until the Reagan administration extinguished it, the doctrine required broadcasters to devote reasonable time to fairly presenting all sides of any controversial issue discussed on the air. The government decided the meaning of the italicized words.