Susan Walsh / AP

On Monday, 31 additional tech companies joined an amicus brief filed on behalf of dozens of companies in opposition to Trump's immigration executive order. On Sunday, 97 companies signed off on the document, which was filed in the Ninth Circuit Court of Appeals.

Notable new adds: Elon Musk's companies, Tesla and SpaceX, HP, and Zenefits—which until this week, was led by David Sacks, a friend and business associate of Peter Thiel. Musk is notoriously still on Trump's CEO council despite Uber CEO Travis Kalanick's resignation last week following backlash.

Still missing: IBM, Oracle, Palantir (co-founded by Thiel), and Yahoo, among others.

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Updated 11 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 8:30 p.m. ET: 30,911,999 — Total deaths: 959,059— Total recoveries: 21,147,903Map.
  2. U.S.: Total confirmed cases as of 8:30p.m. ET: 6,796,384 — Total deaths: 199,474 — 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.

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.

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.