"It increasingly looks like Russian hackers may have affected actual vote totals."

[diva77]

147. It's a combination of factors. Hacking is one of them. You have named other modes as well.

Memory cards are small and easy to switch out and the lighting isn't great at the County Elections Headquarters and elections workers can wear heavy coats while working and workers can be hired off of Craigslist...so many ways things can go wrong...machines can be programmed to break down in the precinct on election day; machines are transported days in advance with a cheap sticker to seal the machine before election day -- leaving them vulnerable to software changes; if a central tabulator is used, it's just a matter of creating an algorithm on the excel spread sheet that delegates votes from 3rd party to Repug every few votes -- they steal just enough. The central tabulator can be online and easily accessed from the moon. Notice how it's the "close elections" that go to Repugs