For decades, AM radio has felt as commonplace as a utility, such a basic fact of life that it’s taken for granted. But that’s changing: Across America, AM radio stations are dwindling in number and profitability, as better-sounding FM signals become cheaper to broadcast and would-be listeners turn to the internet for entertainment.
Yet even in decline, it has a strength that politicians and media insiders who want to understand America would do well to heed. In 2019, thousands of AM stations remain on the air, many of them thriving—in part because they serve unique sets of people whose voices aren’t always heard loudly. For generations, it was considerably cheaper to buy or start an AM station than any other form of mass media, making ownership more accessible to people of color, immigrants, non-English speakers and those with political views outside the mainstream. Without the line-of-sight...