How is this different from silencing employee objections to unethical corporate practices? It’s not merely “talking politics at work” to point out that, for example, your company’s practices are helping a political party steal an election. That’s an ethical concern, not a political one.
> your company’s practices are helping a political party steal an election
Nobody is stealing anything, as the rules are set right now influencing public opinion through media channels is not seen as "stealing". If the powers that be were to physically alter the votes and the voting process that would be another discussion, but almost everything presented in the media is fair game.