It's for that reason that Zuckerberg was actually in Washington yesterday.
Zuckerberg also met President Donald Trump in the Oval Office.
Two months ago, the US Federal Trade Commission hit Facebook with a record $5 billion fine for data protection violations in a wide-ranging settlement that calls for revamping privacy controls and oversight at the social network.
"I said to him, 'Prove that you're serious about data". Facebook didn't share anymore details about what Zuckerberg discussed with Trump.
During his visit, Zuckerberg also met with other senators including Mark Warner, D-Va., vice chairman of the Senate Intelligence Committee, Mike Lee, R-Utah, a senior member of the Judiciary Committee, and John Cornyn, R-Texas, and Tom Cotton, R-Ark.
"Mr. Zuckerberg acknowledged that self-regulation is not going to cut it", Warner, a Virginia Democrat, said to Bloomberg Television. "I think Zuckerberg understood that".
Warner helped organize the dinner with lawmakers at Facebook's request, according to Rachel Cohen, a Warner spokeswoman.
Facebook is battling criticism from lawmakers over its handling of users' personal information, the proliferation of violent content and election interference by foreign operatives.
Democratic lawmakers have attacked Facebook's handling of political content, including the way foreign operators have used the platform to sow discord in American public life. The consultancy's clients included Trump's 2016 election campaign. Josh Hawley and allegedly admitted that there was some kind of bias in a recent controversy surrounding an anti-abortion group - the company was dinged by activists for telling the group Live Action that the statement "abortion is never medically necessary" is factually incorrect.
"He said that they made a mistake, that there was clearly bias", Hawley said.
Warner and Hawley have proposed legislation that would force the tech giants to tell users what data they're collecting from them and how much it's worth. Zuckerberg also told Hawley that for years Silicon Valley has struggled with perceptions of bias and that the industry needs to be aware of the issue, Stone added. Trump has claimed, without evidence, that the companies are "against me" and even suggested USA regulators should sue them on grounds of anti-conservative bias.
"I told Zuckerberg that if he wants to get serious about censorship and proving that Facebook isn't biased, he ought to submit to an independent third-party audit", Hawley told "America's Newsroom".
Lee's office said the two discussed bias against conservatives on Facebook's platform, regulation of online services, enforcement of antitrust laws in the tech industry and data privacy issues.