Why the hysteria over the request for voter information when our state "routinely provides voter data to political party operatives" ? 
Under Open Information Act, non-confidential information is public.
Many candidates and staff have voter lists for their precincts. They know names, party affiliation, recent voting history (if the person voted or not) and addresses. 
How do you think you get targeted by candidates, pollsters, campaign literature and phone calls ?
National marketing and/or polling companies use voter lists. 
Voter lists supply the State with jurors.
It does not tell anyone how or who you voted for, just if you voted.
If you do not want your party affiliation known, you do NOT have indicate a party preference. You have the option of NP, no party.
Some states use the information to purge voting lists voters who are dead or who have not voted in the last ten elections. 
Protecting the integrity of the vote needs to be paramount. A photo on voter registration card would do