New York Post: The static is getting louder at slumping radio-station giant Cumulus Media. After months of watching the stock sink, Cumulus’s biggest shareholder, Crestview’s Jeffrey Marcus, pushed out founder Lew Dickey as CEO and drafted publishing veteran Mary Berner to replace him atop the No. 2 radio broadcaster. But the management shakeup has failed to stem the stock slide. There’s growing speculation that Berner could sell Westwood One, its program syndication service, and major market stations to pay down $2.5 billion of debt.