The security experts from UpGuard company have reveled that a Deep Root Analytics firm, working for the Republican Party, was storing sensitive data on about 200 millions of Americans on an unsecured Amazon S3 server.

The amount of information exposed by the incident was tremendous. The names, dates of birth, home addresses, phone numbers, and voter registration details of nearly all of America’s registered voters were exposed.

It is believed to be the largest ever known exposure of voter information to date.

The Deep Root company has admitted to its mistake and takes "full responsibility for this situation." The data was exposed between 1st and 14th of June, during the updated security settings.

There are fears that leaked data can easily be used for nefarious purposes, from identity fraud to harassment of people under protection orders, or to intimidate people who hold an opposing political view.