Durbin's questions may have started more people thinking about what the United States can do.
The hearings that ended on Wednesday revealed no consensus among U.S. lawmakers about what kind of privacy legislation they might want to pursue, if any, and no timeline for action.
The social media company, he said, is not aware of any specific groups like that, that have engaged in the white supremacist rally in Charlottesville past year.
This censorship from a large liberal California company is bad for our democracy and it directly interferes with your ability to get the news you want. Each had the opportunity to question Zuckerberg during his testimony before the committee.
Near the end of the session, Debbie Dingell, a Democrat from MI criticised Zuckerberg's lack of knowledge of his own company. And yet, for him to come out in public and say "Oh, yes, it was my fault". "You know there are people in Russian Federation whose job is to exploit our systems... so this is an arms race", he said.
"What guarantees can you give us that kids' data isn't being shared?" the senator asked.
On Tuesday Facebook began notifying more than 87 million people around the world, including one million Britons, that their private information may have been given to Cambridge Analytica by an app developer from Cambridge University.
Analysts are also betting that there won't be much in the way of a user or advertiser fallout for Facebook either.
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She said the allegations against her brother-in-law Atul, who was arrested yesterday , were false too. The girl also complained today that she was being kept confined to one room by the administration.
Zuckerberg took almost 10 hours of questions from USA senators and congressional representatives on Tuesday and Wednesday, after facing political pressure to testify about the social network's Cambridge Analytica scandal. "In this period of time, right now in social networking they are a monopoly, but that monopoly will not persist forever", Hoffman said.
When Dingell asked how many websites use these various Facebook tracking tools, Zuckerberg replied that his staff would get back to her, a common refrain the executive used throughout the two days of hearings.
In a series of questions on how people can remove data from Facebook, Zuckerberg said the company does "collect data on people who are not signed up for Facebook, for security purposes".
By the time of the hearing's first break, Facebook's share price had risen by 5% - adding £3bn to his net worth.
By the close of Wednesday's hearing, Zuckerberg had spent roughly 10 out of the previous 24 hours testifying before Congress. He refrained from cracking jokes and flashed few smiles.
Facebook shares closed up 0.78% on Wednesday after rising 4.5% Tuesday.
This seems like a big problem for Facebook because getting consent to collect data about an individual is part of data protection 101. "I want to make sure in an open session I don't reveal something that's confidential", he said.
It is prescription on how companies treat consumer data.
"Oil you can actually see, data you cannot", Bhatt said.