U.S. government researchers are warning that someone could sneak an inexpensive piece of electronics into e-voting machines like those to be used in the next national election and then remotely change votes after they have been cast. ... Basically, when a voter pushes a button to record his or her votes electronically, the remote hijacker could use a Radio Frequency remote control to intercept that communication, change the votes, and then submit the fraudulent votes for recording. The researchers uncovered similar problems with Sequoia e-voting systems in 2009.