"I am committed to helping Ohio deliver its electoral votes to the president next year," wrote the chief executive of Diebold, to 100 wealthy and politically inclined friends.

At least 8 percent of voters may cast their ballots using Diebold machines next November, including voters in Georgia and California, among other states.

According to an analysis by SAIC, "the system is at high risk of compromise." A Stanford computer scientist said that "it would be very easy to steal an election [such that it would not] show up ... as an anomaly."