Jack Dorsey, Twitter CEO, on September 5, 2018. Tom Williams/CQ Roll Call Twitter CEO Jack Dorsey and Facebook CEO Mark Zuckerberg plan to warn lawmakers that stripping back Section 230 would hurt how we communicate on the internet. The remarks are part of the CEOs' prepared testimonies for a virtual Senate hearing on Wednesday, which will focus on Section 230 protections. Democrats and Republicans have largely agreed that Section 230 should be updated, but conservatives have brought greater urgency to the revisions after Facebook and Twitter began fact-checking President Donald Trump's posts in May. Dorsey and Zuckerberg will appear in front of lawmakers again on November 17 for a hearing regarding their companies' handling of a dubious New York Post article about Joe Biden's son. Visit Business Insider's homepage for more stories. Twitter CEO Jack Dorsey and Facebook CEO Mark Zuckerberg plan to warn the Senate that stripping back Section 230 could harm free expression on the internet, according to testimonies they prepared for a Senate hearing on Wednesday, which will focus on the protections.Dorsey said stripping back Section 230 — an internet law that protects tech companies from being liable for content posted on their sites — could "collapse how we communicate on the Internet" and leave "only a small number of giant and well-funded" tech firms, according to his remarks, which Twitter shared with Business Insider.Zuckerberg's testimony, viewed by Business Insider, similarly said that "without Section 230, platforms could potentially be held liable for everything people say" and could "face liability for doing even basic moderation, such as removing hate speech and harassment that impacts the safety and security of their communities."Wednesday's virtual hearing before the Senate Commerce Committee was scheduled in part to open a dialogue around Section 230 protections and potential revisions, and comes just days before the 2020 presidential election.