Yes, this was one of my questions. What is the accuracy and error margin of the voting system itself (and each state seems to have different methods so its not even uniform). Of roughly 126 million votes cast, 1% accuracy would be 1.26 million votes which would be of the same order of magnitude of Clinton's "win" of the popular vote. I have no idea if 1% accuracy is close or wildly too high or too low but we can't have a meaningful discussion without it.

Correction: Actual total was 126M votes for the presidential election not 160M votes as I stated. But the question remains.