Keep the cold war going. Prior to 1988, the key issue was whether you were a hawk or for detente. Many of the other issues were peripheral.
Moving beyond that, have the FCC retain the fairness doctrine. Rush got going, or got big, almost immediately thereafter.
The one thing working against this though is the culture wars. Roe v. Wade is hard to avoid, if not specifically that case then in some form. And its near impossible to avoid many of the other social changes that occurred post 1960. Even without a mouthpiece provided by the FCC, it is still going to radicalize a certain portion of the population.
Moving beyond that, have the FCC retain the fairness doctrine. Rush got going, or got big, almost immediately thereafter.
The one thing working against this though is the culture wars. Roe v. Wade is hard to avoid, if not specifically that case then in some form. And its near impossible to avoid many of the other social changes that occurred post 1960. Even without a mouthpiece provided by the FCC, it is still going to radicalize a certain portion of the population.