While testifying on the Hill, Zuckerberg has repeatedly mentioned how he started Facebook in his dorm room at Harvard University, suggesting the platform has emerged as a more powerful one than he had imagined when it first began.
During the second day of his Washington testimony on the Cambridge Analytica data leak, Rep. Billy Long (R-MO) pressed Zuckerberg on what he and many Republicans view as a coordinated blackballing of conservatives by the social network.
The CEO emerged largely unscathed after a five-hour session before a joint hearing of the Senate Judiciary and Commerce committees Tuesday.
He said that, as with any inappropriate content, Facebook relies on users flagging illegal posts like opioid sales because there are billions of shares, posts and likes on the site daily.
Many people couldn't believe that United States lawmakers who regulate technology have such a loose grasp on how things work.
Businesses can upload their data to Facebook to see if the ads they run on Facebook lead to sales in their stores; they do this via something Facebook calls offline conversions. (There's even one on this article.) They're tracking your browsing activity whether you're a Facebook user or not. That is, if we don't want to have another Cambridge Analytica on our hands.
Although numerous questions that were asked seemed a bit off-topic-often due to the apparent lack of understanding about the company-some senators did focus their attention on the topic at hand.
Anna Eshoo, a Silicon Valley Democrat, asked Mr Zuckerberg if he was willing to change his business model to protect individual privacy.
He squirmed under questioning from Sen. Durbin's ended up being overshadowed by a much larger volume of questions about what the company does and how it works. "So my position is not that there should be no regulation but I also think that you have to be careful about regulation you put in place".
Embedded in this question was a nod to the recent action the European Union has taken to hold Facebook and other big tech companies to tougher privacy standards.
Congress is considering looking into laws to regulate Facebook.
Mike Doyle, a Democratic congressman from Pennsylvania, accused Facebook of "turning a blind eye" to developers' abuses because it was more concerned with attracting apps to its platform than protecting users.
Of the hundreds of questions thrown at Mark Zuckerberg by U.S. lawmakers Tuesday, none appeared to perplex the Facebook founder more than Senator Dick Durbin's pointed query about where he slept the previous evening.
Mark Zuckerberg maintained a matter-of-fact demeanour even as some members openly questioned his sincerity and honesty. Still, it is notable that Zuckerberg confirmed the company's cooperation with Mueller's team.