The American radio news commentator or analyst role came into being in the late 1930s at a time of rising world tensions that would soon lead to World War II. Commentators provide their opinions about and analysis of domestic and international affairs in news segments or programs clearly identified as comment, as distinct from reportage. They are thus the aural equivalent of newspaper columnists—and of what we would term today “op-ed” contributors. [Source: Encyclopedia of Journalism; Commentators, Radio]
radio commentators
journalists
radio
concepts