His remarks came as he opened the second day of a congressional inquisition in the wake of the worst privacy debacle in his company's history.
As Bloomberg reports, Representative Ben Lujan asked Zuckerberg whether or not Facebook collected data on users who did not have an account. Cambridge Analytica did work for the Trump campaign during the 2016 presidential election, but a spokesperson for the Trump campaign told ABC News in a statement that the campaign used the RNC for its voter data and not Cambridge Analytica.
During Wednesday's hearing, Zuckerberg divulged that his own personal data had been sold to a third party. "And [it's] why Facebook is such a special service that people feel a lot of ownership over".
"Every time there is a control right there", Zuckerberg said.
Zuckerberg, who testified before the Senate Judiciary and Commerce Committees for roughly five hours Tuesday, is appearing before the House Energy and Commerce Committee Wednesday, and is facing numerous same questions about alleged Russian election interference, the data breach, and the mechanics of the social media platform he first launched as a student at Harvard.
Rep. Anna Eshoo (D-Calif.), who represents a Bay Area district that includes parts of Silicon Valley, asked, "Are you willing to change you business model in the interest of protecting individual privacy?"
Zuckerberg went on to say that the data protections that Facebook offers Europeans (because they are forced to by EU laws) will be extended to Americans. He said Facebook had considered the data collection "a closed case" and had not alerted the Federal Trade Commission.
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"I do imagine that we will find some apps that were either doing something suspicious or misusing people's data", he said. Graham wanted Zuckerberg to be more specific: Does Facebook have any real competition for its core product, the social media site? He said he did, once again referring to the need to ensure fairness in this year's elections in India, Brazil, Mexico, Pakistan and Hungary.
Just as Facebook provides an online connection for "friends", it also delivers daily highlights of lives that can seem better than ours. Alastair Mactaggart, the chief proponent of the proposed initiative, said: "We're gratified that Facebook has dropped its opposition to the California Consumer Privacy Act".
In the fourth quarter of past year it had 2.2 billion active users - more than a quarter of the world's population. For those of us who have been paying attention to Facebook and its litany of scandals over the past few months, Zuck's testimony in front of committees from the Senate and a (distinctly more lucid) one from the House told us nothing new.
By one measure, Zuckerberg succeeded in his Washington appearance.
The hearings that ended on Wednesday revealed no consensus among USA lawmakers about what kind of privacy legislation they might want to pursue, if any, and no timeline for action.
"To me, he came across as very conciliatory, especially when he took full responsibility for the mistakes of his company", said Jessica Vitak, head of the University of Maryland's Privacy and Education Research Lab.
"I think it's time to ask if Facebook has moved too fast and broken too many things", Rep. Greg Walden (R-OR) stated at the beginning of this morning's hearing.