Multiple things I can't do…
"Voter fraud is rare in the United States, according to a 2007 report by the nonpartisan Brennan Center for Justice at the New York University School of Law. Based on reviews of voter fraud claims at the federal and state level, the center's report asserted most problems were caused by things like technological glitches, clerical errors or mistakes made by voters and by election officials.
"It is more likely that an individual will be struck by lightning than he will impersonate another voter at the polls," the report said.
Alex Keyssar, a professor at Harvard's Kennedy School of Government, calls the current controversy "chapter 22 in a drama that's been going on awhile. The pattern is that nothing much ever comes from this. There have been no known cases of people voting fraudulently.""