Kevin Collier reports:

When 650 thousand Tennesseans voted in the Memphis area, they probably didn’t expect their personal information would eventually be picked apart at a hacker conference at Caesars Palace Las Vegas.

But hackers given access to an ExpressPoll-5000 electronic poll book—the kind of device used to check in voters on Election Day—have discovered the personal records of 654,517 people who voted in Shelby Country, Tennessee.