Allow me to meander a ways with extending what I view as your point:

Should employers use whatever public records they have available to punish employees who donate money to the wrong party or candidates? Perhaps they should use this information in hiring?

If political support is fair game for attacking people in other aspects of their lives, why as a society should we allow for votes to be made in secret?

Maybe we should force people to vote on public record so we can really punish or reward each individual for his or her political choices.

No. That's called thought-policing, and it's wrong.

We should not harm people's livelihood just because we don't like their politics.

Pat, that is a pretty disgusting thing to say. Please reconsider if political viewpoints are worthy of career punishment.

They aren't... but can we make an exception?

Many prominent republicans have come to this same conclusion, so it's not an unreasonable fear.

I didn't mean to suggest employers should consider it. I meant, for example, voters and consumers holding Trump-supporting politicians and public figures in lower regard and voting with their votes & dollars.

That's a good Nazi.