Charlie Miller, a hacker who's made headlines for hacking cars like a Jeep, has left Chinese ride-hailing giant Didi Chuxing after less than five months. Miller worked at the company's new research center in Silicon Valley, which focuses on artificial intelligence, security, and autonomous driving.

Why it matters: Prior to Didi Chuxing, Miller spent a year-and-a-half at Uber. His quick departure from now two ride-hailing companies raises questions about why he's not sticking around longer.

Update: Miller and fellow car hacker Chris Valasek are joining General Motors' self-driving car unit, Cruise, as Recode reported and Valasek confirmed via Twitter. The two joined Uber in mid-2015.

The story has been updated with the name of GM's self-driving car unit.

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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.

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.

Updated 7 hours ago - Politics & Policy

Ohio Gov. Mike DeWine tests negative for coronavirus after positive result

Photo: Justin Merriman/Getty Images

Ohio Gov. Mike DeWine (R) tested negative for the coronavirus after initially testing positive earlier Thursday, his office announced.

Why it matters: 73-year-old DeWine was set to meet President Trump Thursday on the tarmac at an airport in Cleveland and was tested as part of standard protocol.