[KTM rider]

a definitive answer would be in investigating the true cognitive bias ( liberal or conservative) of the key administrators of elections in a particula county.

clever vote Tellers or County recorders Office clerks could register Republican to allude suspicion.

I remember reading somewhere that there is a huge annual convention of Election Officials somewhere, I bet they get ideas on how to manipulate votes there....https://electioncenter.org/

[KTM rider]

correction: I meant “elude” suspicion ( not allude, as in hint/allude to )