I am not advocating for or against this practice; but in the United States the voter record has always been part of the public domain [1].
The National Conference of State Legislatures breaks out a by-state view of what info is available and how it can be used [2]. There's another good article [3] doing a state-by-state analysis of voter file privacy. The public file should only contain: Name, address, year of birth. The following should be kept confidential: DL number, last 4 of SSN, month and day of birth, phone number, information that a person declined to register to vote, the office that received a registered voter's application, digitized signature.
I think you should make it clearer that "the voter record" does not include who you voted for.
Joe Schmoe is a Democrat and voted in the last election is presumably public information.
A record of who he voted for would be unprecedented and explosive news.