"We're shutting down fake accounts and reducing the spread of false news", Sandberg said. Facebook CEO Mark Zuckerberg testified to Congress about Facebook's role in the 2016 election in April. The company sought to send its senior vice-president for global affairs, Kent Walker, but was rebuffed. "The actions we've taken in response - beginning with the steps Facebook's General Counsel, Colin Stretch, outlined to this Committee a year ago - show our determination to do everything we can to stop this kind of interference from happening".
A spokesperson for Twitter declined to comment, but in past hearings Twitter officials have affirmed the gravity of the situation.
"Over the last 18 months we've met with dozens of Committee Members and briefed major Congressional Committees numerous times on our work to prevent foreign interference in U.S. elections", a Google spokesperson said in an email. "However, we've also seen what can happen when our service is abused".
Facebook Chief Operating Officer Sheryl Sandberg acknowledged to the Senate Intelligence Committee that the company was too slow to respond to Russian efforts to interfere in the 2016 US election and general American political discourse, but insisted it is doing better.
Earlier this year the company said it was taking aggressive measures to combat inauthentic accounts.
Serena Williams: ‘Every Human’ Should Be ‘Completely Grateful’ for Colin Kaepernick
There were more cheers when the home favorite then broke for a 2-0 lead and Williams rolled on to victory. But Williams didn't back down from either challenge. "Obviously it won't be easy", she said .
The Twitter CEO will also make a solo appearance before the House Energy and Commerce Committee, where Dorsey is expected to face tough questioning on allegations that the social platform has suppressed conservative voices.
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", Dorsey will tell lawmakers Wednesday, according to a copy of his prepared remarks released in advance.
"Maybe I did a better job because I'm good with the Twitter and I'm good at social media, but the truth is they were all on Hillary Clinton's side, and if you look at what was going on with Facebook and with Google and all of it, they were very much on her side", Trump told the Caller.