"Congress is going to have to take action here".
Facebook's Sheryl Sandberg says the company is getting better at finding and combating adversaries who try to use the platform. Senate leaders rejected Google's offer to make Kent Walker, its senior vice president and chief legal officer, available for the hearings.
Top Twitter and Facebook executives will defend their companies before U.S. lawmakers on Wednesday, with Facebook insisting it takes election interference seriously and Twitter denying its operations are influenced by politics. Sandberg said the company is making changes to its advertisement system, letting users know who paid for what, and is working to more efficiently identify false information.
He said Twitter is committed to rooting out abusive activity and "hostile foreign influence". "However, we've also seen what can happen when our service is abused". And Facebook's CEO, Mark Zuckerberg, ran the gauntlet of the House and Senate in April, following the revelations of the Cambridge Analytica data harvesting operation.
The companies have made many policy changes, and have caught and banned malicious accounts over the past year.
Biden Eulogises Friend John Mc Cain As 'giant Among All Of Us'
But Biden, who is considering challenging Trump in 2020, made what some saw as a veiled reference to the president. John McCain during a viewing at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. "God, he loved it".
Dorsey is also testifying before the House Energy and Commerce Committee later in the day over allegations of bias against conservatives on social media. Twitter denies that's happening.
On bias, the Twitter CEO said in prepared testimony before his second hearing that "Twitter does not use political ideology to make any decisions, whether related to ranking content on our service or how we enforce our rules".
"We believe strongly in being impartial, and we strive to enforce our rules impartially", he said.
Laura Rosenberger, the Director of the Alliance for Securing Democracy at the German Marshall Fund, told ABC News that likely won't be a problem for the Senate Intelligence Committee, as that committee in particular has been "steeped in understanding the challenges posed by foreign interference".
Congress has sharply criticized the social media companies over the past year as it has become clear that they were at the forefront of Russia's interference in the 2016 elections and beyond. Now, executives from some of those giants will tell lawmakers the steps they have taken since to prevent similar attacks.
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