Facebook CEO Mark Zuckerberg. Photo: Noah Berger / AP

Facebook and Twitter confirmed they will answer questions at a November hearing that's part of a Senate committee's investigation into Russian election meddling. Alphabet has also been invited to the hearing that's part of a larger Senate Intelligence Committee investigation into Russian election inference but haven't confirmed their attendance.

Why it matters: Facebook staffers, specifically, have rarely testified on Capitol Hill despite its ascendance as one of the most valuable technology companies in the world. And many tech companies are still largely represented by trade groups in Washington. But tech is under unprecedented pressure on several fronts, and the big companies want to be seen as taking concerns seriously.

What they're not saying: Whether it will be Mark Zuckerberg in the hot seat for Facebook. Several top Facebook employees, like security executive Alex Stamos and policy chief Elliot Schrage, have been part of the public response to concerns about Russia, Facebook, and the 2016 presidential race. Twitter has also declined to say who will testify.

Go deeper: Senate Intelligence Committee leaders said there's still a long way to go in this investigation, per Axios' Alayna Treene.

This post has been updated to reflect Twitter's planned participation in the hearing.

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Right-wing media defanged by dissolving anti-Biden storylines

Data: NewsWhip; Chart: Naema Ahmed/Axios

The three biggest anti-Joe Biden storylines in right-wing media over the last year have either fizzled or are getting less online traction than they used to, according to data from NewsWhip provided exclusively to Axios.

Why it matters: This dynamic has rendered a formidable media ecosystem less effective in boosting President Trump as we move into the heart of the 2020 campaign.

A coronavirus alarm bell is going off in the Midwest

Data: The COVID Tracking Project; Note: Positive rate shown is the 7-day average from June 1 to Aug. 6, 2020; Cartogram: Andrew Witherspoon/Axios

A cluster of states in the Midwest are seeing more of their coronavirus tests coming back positive — potentially an early indicator of a growing outbreak.

The state of play: A high positive rate means that a higher share of those getting tested are sick. That could be because there are more sick people, or because a state isn't doing enough testing.

Biden clarifies comments on African American and Latino communities

Joe Biden delivering a speech in Delaware in July. Photo: Mark Makela/Getty Images

Joe Biden explained on Twitter Thursday night what he "meant" by earlier comments suggesting that "the African American community is a monolith."

What they're saying: "Unlike the African-American community, with notable exceptions, the Latino community is an incredibly diverse community with incredibly different attitudes about different things," Biden remarked in an interview hosted by the National Association of Hispanic Journalists and the National Association for Black Journalists, Politico reports.