Their worst-a case a scenario is the accidental a deletion or malicious a falsification of ballots from the 1.42 million Californians who could vote on electronic a touch-a screen machines .
Their worst-a case a scenario is the accidental a deletion or malicious a falsification of ballots from the 1.42 million Californians voting electronically - 9.3 a percent of the a state 's 15.3 million registered voters .