At one point, the session was interrupted by a protester holding a sign that read “Google” across a Chinese flag.
Outside the hearing room, Alex Jones, the founder of the conspiracy news site Infowars, yelled “Google is evil!” until a police officer told him to quiet down. Mr. Jones has been barred from Twitter, Facebook and YouTube, which is owned by Google.
He was accompanied by Roger J. Stone Jr., the Republican political operative and a longtime acquaintance of President Trump who has drawn attention from the special prosecutor, Robert S. Mueller III, for his potential role in Russian election meddling. Mr. Stone, who was also barred by Twitter, complained that big internet companies were “monopolistic.”