Abstract
Conservative Talk Radio continues to shape US politics in the 21st century, but it has a deeper history. Using newly digitized archival records, we provide new evidence on the electoral effects of Conservative Talk Radio in the historically consequential period from 1950 to 1970. Conservative radio hosts like Clarence Manion, Billy James Hargis, and Carl McIntire rapidly expanded their network during the early 1960s before the Kennedy administration took regulatory steps to dismantle their business model. We find that in counties where these shows aired on local stations, the Republican vote share increased following their introduction. Anticipatory effects are small and insignificant, which supports a causal interpretation of this effect.