It always seems that voting machine "calibration issues" resolve to the benefit of Democrat candidates. If it were truly "calibration issues" as they claim, some votes for Democrats would be recorded as a vote for a Republican instead. No, this very clearly is intentional. Either the company supplying the machines has corrupt employees tampering with the inner workings, or corrupt employees at the County level are setting up the machines this way, hoping to gets some of the not so sharp eyed voters to vote unwittingly for favored candidates.
So what do we do about this? If machines in different states repeatedly changed votes from Democrat to Republican, Eric Holder would have launched a federal investigation under suspicions of fraud and I doubt "calibration error" would be accepted as an excuse for widespread problems.The Republicans have shown themselves to be largely ineffective in ferreting out and punishing any of the lawless behavior of this administration, whether it is Fast and Furious or the IRS scandal. They have had six years, and no one has gone to jail yet. So, as to "what do we do about this?" I dunno. Perhaps put some teeth into the notion that if a particular candidate receives the benefit of vote fraud, that candidate shall be presume guilty and spend time in the slammer. In any case, unless there are consequences to the actual candidates, this is never going to stop, and indeed will continue to get worse.