""[The] Constitution ensures voters ballot choices will always be secret. Americans have died protecting this freedom," tweeted South Carolina's Republican governor, Henry McMaster."

Nothing in the requested information even approaches how a specific individual voted in any election.  Just because you are registered with one party or the other does not mean you voted that way.
This widespread refusal to provide this information on sale to others only provides fodder for conspiracy "theorists" - which will do more damage to the confidence in the electoral system than any "Russian interference".