The people tearing into electronic voting are going after the wrong target.
In a state where there is only one news agency (the government one), it's possible to steal an election by ballot stuffing, fake votes, etc. In a state where there are a fairly large number of independent and semi-independent news agencies, it's pretty much impossible. If all the pre-election polling and exit polling indicates candidate A is winning by 7%, and candidate B suddenly comes out with a 5% lead despite that, everyone starts taking a *really* close look at the election mechanisms, because statistically you just don't see that kind of inaccuracy across the board.
To steal an election in America, you have basically three options:
1. Have a deniable asset do an unanswerable last-minute negative campaign. Think "election day mailer claiming candidate B has ties to organized crime." It doesn't need to be true, it just needs to skew the "undecided" voter long enough to go to the polls, because we don't invalidate election results after that kind of event here.
2. Gerrymander the districts so your party has an overwhelming advantage. This is very well-described elsewhere, so I'm not going to go into the mechanics behind it, but needless to say it works and it's legal in a lot of the country.
3. Make it harder for members of the other party to vote. Want to make it harder for the elderly to vote? Put restrictions on voting by mail, because many of them have mobility issues. Want to make it harder for the poor and working class to vote? Put specific ID requirements (driver's license is a common one since there's not a whole lot of reason to have a driver's license if you have no car) in place, or restrict polling place hours so that they won't be able to vote during work. There's also the popular "play games with the voter rolls" stunt, but we're starting to wise up to that one, so it's getting less effective.
So there you go. Want to steal an election? Manipulate who is allowed to vote and how their vote is apportioned, not how their vote is cast.