House Energy and Commerce Committee leaders sent a formal invitation to Facebook founder Mark Zuckerberg Mark Elliot Zuckerberg2.5 million US users register to vote using Facebook, Instagram, Messenger Hillicon Valley: Trump's ban on TikTok, WeChat in spotlight | NASA targeted by foreign hackers | Instagram accused of spying in lawsuit The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE to testify before the panel over revelations that political consulting firm Cambridge Analytica accessed 50 million Facebook users' data without consent.

The group, led by Chairman Greg Walden Gregory (Greg) Paul WaldenTrump order on drug prices faces long road to finish line Ignore the misinformation: The FDA will ensure the safety of any COVID-19 vaccine Hillicon Valley: Trump backs potential Microsoft, TikTok deal, sets September deadline | House Republicans request classified TikTok briefing | Facebook labels manipulated Pelosi video MORE (R-Ore.) and ranking Democrat Frank Pallone Jr. Frank Joseph PallonePharma execs say FDA will not lower standards for coronavirus vaccine Dem chairmen urge CMS to prevent nursing homes from seizing stimulus payments Federal watchdog finds cybersecurity vulnerabilities in FCC systems MORE (N.J.), sent a letter to Zuckerberg on Friday saying that Facebook has not been forthcoming about the scandal.

They also responded to the Facebook CEO’s recent media blitz in which he suggested he would be open to testifying before Congress.

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“In comments to the press, you stated that the person with the most knowledge at Facebook about what Congress is trying to learn is the appropriate witness for a congressional hearing,” the letter reads. “As the Chief Executive Officer of Facebook and the employee who has been the leader of Facebook through all the key strategic decisions since its launch, you are the right person to testify before Congress about those decisions and the Facebook business model.”

Walden and Pallone joined a growing group of lawmakers who have called for Zuckerberg to testify on the data scandal.

In their letter, they also said that they still had a lot of unanswered questions after Facebook officials briefed the committee this week, and complained that the employees sent to represent the company “did not have personal knowledge of events prior to their tenure at Facebook."

A Facebook official said that the company had received the letter and was reviewing it.

The House leaders said that the Commerce Committee will be holding a hearing on the incident in the “near future.”

Updated at 10:57 a.m.