The hearing began at 10 a.m. ET.
Bipartisan members of the committee are eager to reform Section 230, which protects tech platforms from liability from their users' posts and also allows them to moderate and remove posts they find objectionable. The shield has come under attack from Republicans who accuse platforms of using it to shield them from claims of bias and Democrats who accuse them of failing to effectively remove harmful content.
The hearing will also cover the widespread desire for a digital privacy law and concerns about the tech platforms' impact on local media.