According to The Seattle Times, the CIA assumes that Hugo Chávez has cleverly used voting machines in Venezuela “to undermine democratic elections”:
When Chávez won, Venezuelan mathematicians challenged results that showed him to be consistently strong in parts of the country where he had weak support. The mathematicians found “a very subtle algorithm” that appeared to adjust the vote in Chávez’s favor, Stigall said.
The article also mentions causes in Macedonia and Ukraine. I personally still hope that there will be electronic voting systems we can control and trust in the future. But nowadays voting machines offer alluring possibilities of tampering.
