Sen. Hawley has also announced legislation that would remove tech titans’ protection from liability for third-party content on their platforms. Under the Ending Internet Censorship Act, these companies are able to “retain Section 230 protections if they prove they are politically neutral to a third-party auditor,” a Hawley spokesperson told Fox News.

Zuckerberg’s visit to Washington came amid a fraught period for Facebook, with lawmakers calling for closer scrutiny of the company amid privacy and censorship bias concerns. Facebook currently faces an anti-trust probe led by state attorneys general as well as a separate antitrust investigation by the Federal Trade Commission (FTC).

That agency slapped Facebook with a $5 billion fine over the company’s privacy policies, and the company agreed to enact new oversight on how the company utilizes user data.

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This story has been updated to include Elizabeth Warren’s reponse.

Fox News’ Morgan Phillis, James Rogers and the Associated Press contributed to this report.