The term beacons refers to technology that lets Bluetooth-enabled devices periodically broadcast data. Bluetooth beacons are often used to help your phone figure out where you are in the mall or let an advertisement at the bus stop send you a website. But privacy advocates worry the technology can be used to identify individuals and track their movements.
It wasn't clear how the campaign intended to use the beacon data collected, especially since no other major campaign sites include language referring to the devices. But hours after CBS News contacted the campaign about how it intended to use the data, language referring to the devices was removed from the site.
The White House didn't immediately respond to a request for comment.
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