Source: TedX YouTube

Mamoon Hamid is leaving venture capital firm Social Capital, which he co-founded, in order to join rival Kleiner Perkins Caufield & Byers, Axios has learned. He will focus on early-stage tech investments, with a focus on enterprise software. An official announcement is expected later today.

Why it matters: This is part of yet another shake-up for Kleiner Perkins, one of Silicon Valley's most celebrated venture capital firms, as it tries to find its next generation of leaders. And it nearly happened years earlier, when Kleiner Perkins almost acqui-hired the Social Capital partners.

Resume: Hamid has invested in, and served as a board director for, such companies as Slack, Yammer, Box and Netskope. Prior to helping launch Social Capital in 2011, Hamid spent six years with U.S. Venture Partners.

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Arrest over letter to Trump containing poison ricin

President Trump returning to the White House from Minnesota on Sept. 18. Photo: Win McNamee/Getty Images

A suspect was arrested for allegedly "sending a suspicious letter" after law enforcement agents intercepted an envelope addressed to President Trump containing the poison ricin, the FBI confirmed in an emailed statement to Axios Sunday.

Details: The suspect, a woman, was arrested while trying to enter New York from Canada, law enforcement forces said.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 7 p.m. ET: 30,881,522 — Total deaths: 958,493— Total recoveries: 21,119,006Map.
  2. U.S.: Total confirmed cases as of 7 p.m. ET: 6,794,479 — Total deaths: 199,469 — Total recoveries: 2,590,671 — Total tests: 95,108,559Map.
  3. Politics: Testing czar on Trump's CDC contradictions: "Everybody is right" Ex-FDA chief: Career scientists won't be "easily cowed" by political vaccine pressure.
  4. Education: What we overlooked in the switch to remote learning.
  5. Health: The dwindling chances of eliminating COVID-19 — 7 states set single-day coronavirus case records last week.
  6. World: England sets £10,000 fine for breaking self-isolation rules — The countries painting their pandemic recoveries green.

Trump campaign goes all in on Pennsylvania

Trump poster in Scranton, Pennsylvania. Photo: Robert Nickelsberg/Getty Images

The president's campaign is placing more importance on Pennsylvania amid growing concern that his chances of clinching Wisconsin are slipping, Trump campaign sources tell Axios.

Driving the news: Pennsylvania, which has 20 electoral votes, twice Wisconsin's number, actually has been trending higher in recent public and internal polling, a welcome development for the campaign.