What we know is what he's done with the 20 radio stations he already owns, which is nothing. The same repubs who are challenging this sale also challenged that one, giving the same view that he would impose liberal talk on conservative stations. In fact several local talk hosts at those stations quit rather than work there. Nothing happened. No changes in programming. The stations are doing the same thing now that they did two years ago when they were sold.
But the fact is that the FCC can't deny a sale based on the politics of an investor. They also can't deny a sale based on potential programming changes an investor might make. The FCC didn't prevent EMF from buying a bunch of commercial stations and flipping them to religion. We as a free people should be concerned if the government in fact had that power and could impose what it wants on radio & TV. There's a reason why the federal government is in fact prohibited from owning broadcasting. These politicians can't stop the sale, so they're trying to delay it until after the election. Can you say "election interference?" That's what they claim Soros is doing. It's all projection. That's what they would do if they were in power.