broadcasting and cable magazine

Ronald Reagan became an announcer for the University of Iowa Hawkeyes football team in 1932.  He later got a staff announcer job at Davenport, Iowa’s WOC-AM.  He moved to Des Moines’ WHO-AM in 1934, where he created play-by-play accounts of games based on wire reports.

Decades later, after serving as California’s governor, radio producer Harry O'Connor approached Reagan about a syndicated radio commentary.  The first was broadcast in 1975.  It aired over more than 200 radio stations.  The program reached tens of millions of Americans each week.

When Reagan sought the 1976 Republican presidential nomination, Senator Barry Goldwater (R-Ariz.) took over the radio commentaries.  

After Reagan conceded the nomination to President Gerald Ford in August 1976, he resumed the commentaries.  The broadcasts continued until 1979, when Reagan stopped the program to pursue the 1980 Republican presidential nomination.  In all, he recorded more than 1,000 radio commentaries.

Source: NYTimes.com: ‘Reagan’s Path to Victory’