Twitter isn't biased for or against any type of partisan but is working on ways to raise the level of debate on its platform, the company's CEO will tell a Senate hearing in Washington, D.C., today.
In a statement, Twitter denied Dorsey was involved in either decision.
Sheryl Sandberg will tell the Senate Intelligence Committee on Wednesday that Facebook was "too slow to spot" Russian interference in the 2016 US presidential election and "too slow to act", according to an opening statement the Facebook chief operating officer released Tuesday. Google, however, risks having an empty chair at the hearing after cofounder Larry Page declined to appear. That scrutiny has led to additional criticism over the companies' respect for user privacy and whether conservatives are being censored.
Top Twitter and Facebook executives will defend their companies before United States lawmakers on Wednesday, with Facebook insisting it takes election interference seriously and Twitter denying its operations are influenced by politics.
This will be the first time Sandberg has publicly faced significant questioning about Facebook's role in the 2016 election.
Dorsey is also testifying before the House Energy and Commerce Committee later in the day over allegations of bias against conservatives on social media.
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.
Sandberg, in her opening statement, said Russian interference, "violated the values of our company, and of the country we love", and emphasized that Facebook is increasing its staffing to identify malicious actors.
The back-and-forth with Google is the latest in a year's worth of attempts by Congress to force the companies to focus more sharply on the Russian interference issue.
"Google and Twitter and Facebook, they're really treading on very, very troubled territory and they have to be careful".
Earlier this year the company said it was taking aggressive measures to combat inauthentic accounts. Thirteen Russians were indicted by special counsel Robert Mueller this year on charges of an elaborate plot to disrupt the 2016 US presidential election by creating fake accounts that pushed divisive issues on social media. He says Twitter has so far suspended 3,843 accounts the company believes are linked to the agency, and has seen recent activity.