For anyone interested, I went digging. In fact the citation for that (FCC Chair) McNinch quote that is (not quite correctly) excerpted in the Coughlin article

For anyone interested, I went digging. In fact the citation for that (FCC Chair) McNinch quote that is (not quite correctly) excerpted in the Coughlin article is a 1938 Times article talking about how he'd "recently" said it in a speech (I can't find a cite for the speech itself). The FCC was created in 1934, four years earlier. So arguing from this basis that it was created to censor is clearly just plain wrong. The wikipedia narrative on the Coughlin page is basically a lie.