Former advisers to President Barack Obama’s 2012 re-election campaign say they used personal data from Facebook users in a proper way.
They are drawing distinctions to practices used by Cambridge Analytica, the firm connected to President Donald Trump’s 2016 campaign that has been accused of improperly lifting data on 50 million Facebook users.
Former Obama advisers say they collected the Facebook data with their own app, complied with the social media platform’s terms of service and received permission from their campaign supporters.
The data was used to benefit Mr Obama’s voter turnout programme.
An estimated one million Obama supporters gave the campaign access to their Facebook data.