The national media, here in the U.S., has been, and remains, the domain of the Left.
So it has been ever since Franklin Delano Roosevelt "packed" the Federal Communications Commission in the 1930s. At that time radio was the place where the innovation, growth, excitement and money was at. It was the growth industry of the '30s and the big newspapers and publishing houses all owned radio stations. FDR yanked FCC licenses from yokels and enemies and handed them out to his Democrat friends - NBC and CBS were his particular favorites. Newspapers took the hint and their owners kept and got more FCC licenses. Lyndon Johnson, as a congressman from Texas, got rich on radio stations/licenses handed to him by FDR's flunkies at the FCC. Ideological nepotism persists in network newsrooms and journalism schools to this day.