In my opinion, there's something very socialistic about these tariffs. While the government wouldn't "own" the means of production, the tariffs are in essence determining the means of production. So the mythology of a free market economy is completely destroyed. Companies would be forced, by reaction to the tariffs, to completely change their business model. What we're seeing is that the government wants to have a hand in all private businesses. By doing so, the government deputizes private companies into becoming tax collectors.
How would that effect radio? Advertising is an expense. If companies need to reinvest in different production systems or eat a chunk of profit so the tariff-inducted prices don't kill their business, that leaves less money to buy advertising.