This has to be illegal.
If a boss can't intimidate their employees this way ("A vote for Biden is a vote for a pay cut and layoffs!"), then there's no reason this should be allowed.
Why would it be illegal? A "boss" and an "employer" are two different sort of relationships.
Our kids' schoolteachers, through their unions, send parents all sorts of messages about how dire things will be if they vote wrongly. Our Doctors tell us how much more healthcare will cost if we vote wrongly. The landlord has free speech, does he not? Is he/she threatening tenants with eviction?
Elections have consequences. One consequence is greater or lesser tax consequences on voters, or on specific groups of voters. This is a cheesy appeal, but I find it hard to see how it's illegal.
