Last I heard political speech is a particularly tricky category for any entity to so blatantly suppress. These outlets may have just stepped into a very expensive patch of legal mire. After all, if a baker must prepare a cake which contains statements anathema to his moral beliefs, by what right does an FCC licensed broadcast utility refuse a political ad?
The fact that they are a business like those bakers doesn't give them the right to censor a political ad.
It’s actually worse than that. According to FCC regulations, the Big Three operate in part due to their “public service” commitments, which includes running paid political ads.
Sessions already could have 15,000 lawyers and couldn’t investigate all the crap that’s out there, but this should be up there.