Cambridge Analytica
Facebook Vice President Andrew Bosworth also said that the president's victory was not a result of outside influence but of clever digital advertising.
Federal regulators will also institute new oversight and restrictions on the business.
UK Parliamentary committee accused Facebook of cutting special deals with some app developers to give them more access to data, while icing out others.
Google has now decided to shut down Google Plus, which never really took off. This massive data breach has proved to be the final nail in its coffin.
But its down to how these principals are interpreted in a data protection law.
The fine could herald more punitive action against the social media giant.
The political research firm said it has been the subject of “numerous unfounded accusations.”
Zuckerberg succeeded in deflecting questions like a Washington veteran.