Further, Pennsylvania and Virginia do not mandate paper-trail backups for their touch-screen electronic voting machines. Critics of e-voting say that without that paper trail, there is no way to audit the results of a touch-screen machine.
Several states do not have adequate numbers of voting machines in place to back up malfunctioning equipment.
As Smith points out
"This is an election that will sort of stress-test the [election] systems," she says. "Any problem that's going to come up is going to be amplified."
See full article in PCWorld.