During a rare press conference last week, Zuckerberg was grilled by journalists over Facebook's privacy lapses. There is practically no regulation, and because of this, it is incredibly simple for companies like Cambridge Analytica to deceive and exploit consumers, and in the same way, possible for foreign governments to influence domestic politics.
"We didn't take a broad enough view of our responsibility, and that was a big mistake", he said in prepared remarks released by the House energy and commerce committee on Monday. Will Zuckerberg be flustered by senators' gripes and tough questions?
Congress has plenty of questions for Facebook CEO Mark Zuckerberg, who will testify on Capitol Hill Tuesday and Wednesday about the company's ongoing data-privacy scandal and how it failed to guard against other abuses of its service.
He did so again on Monday in written testimony to U.S. Congress, and will likely repeat that on Tuesday and Wednesday as he faces congressional committees looking into Facebook's management and protection of user data. Unlike when he deals with the media, his public relations team won't be there to cherry-pick questions from friendly parties.
Still, the world's 2.2 billion Facebook users are getting a rude awakening: They're not the customer; they - and their personal information - are the product.
Adam Hodge, a crisis communications veteran from SKDKnickerbocker, agrees.
Senator Mike Rounds says third-party apps often sell people's information, but what happened in this situation took it to the extreme. In addition to saying he is sorry - something he has done several times already - Zuckerberg outlines the steps the company has taken to restrict outsiders' access to people's personal information.
Tighter regulation of how Facebook uses its members' data could affect its ability to attract advertising revenue, its lifeblood.
Mark Zuckerberg is ready to apologise. "He does not want to see strong regulatory oversight". Facebook is a data collection company.
"This is a long-standing problem, not a bug in the Facebook system".
He also says the company is investigating every app that had access to a large amount of information before the company moved to prevent such access in 2014 - something that came too late in the Cambridge Analytica case.
"The main issue is not whether or not entities have individual data but how that data is being used".
Cambridge Analytica whistleblower Christopher Wylie previously estimated that more than 50 million people were compromised by a personality quiz that collected data from users and their friends.
Chester agrees: "People have no idea what is operating behind the Facebook curtain".
The company's data practices are under investigation by the US Federal Trade Commission.
The company is pouring money into its defence, hiring USA law firm WilmerHale, led by Reginald Brown, previously a special adviser to President George W Bush, to coach Zuckerberg on the best strategies for handling the heat, according to the New York Times.
On Monday, Facebook agreed to supply proprietary data for a study on its role in elections and democracy. The company spent nearly $12m on lobbying in 2017 and is now on a "hiring spree" for policy communications specialists.
The company's founder and CEO will appear before a joint hearing.
Zuckerberg and Sandberg both admitted last week that there would be future privacy headaches for Facebook and its users.
Paul Argenti, a professor of corporate communication at the Tuck School of Business at Dartmouth, says the numerous Facebook announcements are not doing the company any favors. "He's going to have to be prepared for that".