I think he likely is confused. It is possible in many states to see who has registered as a member of each party (and therefore has the privilege of voting in that party’s primary election).
My party affiliation has been strategic for a long time. Where I live, few local offices have contested primaries in the party that I’m most inclined to support in the general election. Moreover, my state has a late primary. Almost never is the race for Presidential nominee till in contention by the time of the primary. My interests are best served by voting for the least insane candidates that the other party is standing for the local offices. I don’t have to vote for those bar stewards in the general election.
I could imagine Sanofi using the information about party affiliation, but it would cut with a very dull knife in my case and the case of a good many of my colleagues.
Another trick that companies play is to solicit/demand employee contributions to a company PAC. That’s totally illegal , but they do it anyway and get away with it. They claim that it’s entirely voluntary (not quite!) and that your contribution is private (it’s anything but). I’m near enough to retirement that I refuse as a matter of principle. If they fire me, they might be doing me a favour.
