The insinuation is that the disparity in voting methods could reflect tampering (for Trump or Clinton, depending on your party affiliation). I think there is a

The insinuation is that the disparity in voting methods could reflect tampering (for Trump or Clinton, depending on your party affiliation). I think there is actually robust statistical approaches to detecting irregularities and to normalize for demographic differences, etc. If anyone has a credible source for such a study, I'd suggest replacing the original link, which offers no evidence, statistical or otherwise.