In the prepared testimony, Zuckerberg addresses what happened with Cambridge Analytica and what Facebook is doing about it. He also talks of Russian election interference.
Mark Zuckerberg's says Facebook didn't do enough to prevent the social media's giant's "tools from being used for harm."
"That goes for fake news, foreign interference in elections, and hate speech, as well as developers and data privacy," he said. "We didn't take a broad enough view of our responsibility, and that was a big mistake. It was my mistake, and I'm sorry. I started Facebook, I run it, and I'm responsible for what happens here."
Meanwhile, Facebook announced on Monday that it's launching an independent election research commission that will solicit research on the effects of social media on elections and democracy.
"The goal is both to get the ideas of leading academics on how to address these issues as well as to hold us accountable for making sure we protect the integrity of these elections on Facebook," Zuckerberg said in a post.
Also, attorneys general in 37 states sent a letter to Zuckerberg in late March demanding answers on privacy concerns. Missouri's Republican Attorney General Josh Hawley has launched a probe into Facebook's personal date use, issuing a civil investigative demand. Other attorneys general are taking action or calling for meetings with Facebook executives, as well.