The Senate Judiciary Committee concluded its hearing with Mark Zuckerberg, the executive director of Facebook, and Jack Dorsey, the executive director of Twitter, after more than four hours and 127 questions on Tuesday.
The New York Times tracked every question. We found the following:
Republicans dominated and asked about content moderation the most.
Republicans asked senior executives 72 questions, 53 of which related to how they moderate content on their social media platforms. Republican senators particularly focused on how Twitter and Facebook could use less moderation, with 37 questions about the censorship of conservative voices and the ideological makeup of their workforce.
Democrats asked 14 questions about content moderation, but most focused on whether more moderation could help prevent the spread of hate speech and violence.
Other topics were mentioned sparingly.
After the moderation of content, the legislator asked the most about misinformation, with 39 questions about the spread of misinformation on social media platforms. Democrats have responded to 37 of these questions, often mentioning President Trump's false claims about election fraud in the presidential election.
Senator Amy Klobuchar, a Democrat of Minnesota, briefed both Mr. Dorsey and Mr. Zuckerberg of antitrust concerns. Senator Lindsey Graham, a Republican from South Carolina, asked if Facebook and Twitter could be addicting.
Most questions were asked of Mr. Zuckerberg.
Mr Zuckerberg answered most questions with 71 questions and Mr Dorsey was asked 56 questions.
Mr. Graham, the chairman of the committee, asked 15 questions, most from any Senator, while Republicans Ted Cruz from Texas and Josh Hawley from Missouri each asked 12 questions.