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 has decided to testify before Congress, according to a report from CNN.

The Facebook chief executive has been under enormous pressure to publicly answer questions from lawmakers since it was revealed that a campaign research firm working on President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's campaign took user data from 50 million Facebook accounts as part of an effort to target voters.

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Zuckerberg as declined to appear before members of Parliament in London, but CNN, citing Facebook sources, said the social media giant's leader decided it was not possible to avoid testimony from Congress.

Facebook also believes that in testifying, Zuckerberg will put pressure on Twitter CEO Jack Dorsey and Google CEO Sundar Pichai to also appear before lawmakers, reports CNN.

On Monday, the Senate Judiciary Committee formally invited Zuckerberg to personally testify on Capitol Hill alongside Pichai and Dorsey. Last week, the House Energy and Commerce Committee has also asked Zuckerberg to testify sans executives from other companies.