Preserving voting integrity means ignoring crackpot complainants who offer no evidence.
Preserving voting integrity means purging the voter rolls of illegals, other non-citizens, fakes, felons, duplicates, residents of other states, the deceased, etc; enforcing proof of citizenship to register; enforcing voter ID at precincts; abolishing 2-month-long early voting (ballot stuffing) periods and generally discouraging early voting; actually counting absentee votes from military personnel instead of throwing them out; etc.
But we already know what federal judges have to say about all of that.