"I'm not even sure it's trending in the right direction", he added. Warner has proposed ways that the companies could be regulated for the first time. "Congress is going to have to take action here", he said.
"That's on us", she wrote.
The hearing was called amid fears that the United States midterm elections could again become a battleground for false and misleading claims whipped up on social media to influence voters. The report gave no other details.
Facebook Chief Operating Officer Sheryl Sandberg acknowledged that the social media network failed to crack down on attempts from Russian Federation to influence the 2016 U.S. presidential elections, according to AFP.
Big Ten Network suspends analyst Braylon Edwards for tweets
Edwards was an All-American at MI in 2004 and is the school's career leader in catches, yards and touchdown catches. Braylon Edwards got called for an unnecessary roughness foul - against his own team.
Moscow denies involvement, and Trump - backed by some of his fellow Republicans in Congress - has repeatedly dismissed investigations of the issue as a partisan witch hunt or hoax.
Jack Dorsey, chief executive of Twitter, also acknowledged his company's past failures. Jones railed on the government, media and social media companies for more than 40 minutes in the hallway as the hearing began, and later took a seat in the hearing room. Rosenberger, who testified before the same committee on foreign influence on social media last month, said she has "every expectation that [the hearing] will be serious from the lawmakers' side".
Dorsey was responding to a question from California Representative Doris Matsui during a House Committee on Energy and Commerce hearing that focused on user privacy protections, misinformation, content moderation and alleged bias against political conservatives on Twitter.
President Donald Trump used Twitter on July 26 to fault the website, without evidence, for using so-called shadow banning, or limiting the visibility of, prominent Republicans. Republicans control both the House and Senate and the elections will decide whether they keep their majorities. Rubio slams movie for omitting Armstrong planting American flag on the moon MORE (R-Fla.), who's also on the committee, suggested Google didn't attend either "because they're arrogant" or because of aBuzzFeed News story published Tuesday that showed researchers reportedly posing as Russian trolls were able to purchase ads on the search platform.
Lawmakers also criticized Alphabet Inc's (GOOGL.O) Google for refusing to send top executives to testify in the Senate on foreign efforts to influence US politics, with just weeks before the November 6 congressional elections.
Senate leaders rejected Google's offer to make Kent Walker, its senior vice president and chief legal officer, available for the hearings.