That's ridiculous. A campaign that well funded has folks positioned to see that sort of thing. Politics is nasty business... opposition research and spies are all over the place.

In Hillary's case it's even more absurd to claim that they could have known nothing -- many of the voters targeted and flip flopping were union guys and easy to get intel out of. End of the day, the campaign fucked up.

I come from New York, where we had easily manipulatable, gear-driven mechanical machines for decades. (It was pretty trivial to jam them up, and the historical over representation of the number 9 in results validated that) The major parties understood the margin of error and used absentee balloting to cover that risk.