Sen. Mitt Romney (R-Utah). Photo: Chip Somodevilla/Getty Images

President Trump attempted to pit Utahan voters against Republican Sen. Mitt Romney via Twitter on Saturday, claiming that state residents now consider voting for him in 2018 to be a mistake.

Why it matters: Romney, who criticized the Trump-Ukraine allegations after reading the whistleblower complaint, is one of the first Republican senators to denounce Trump's calls for China or Ukraine to investigate one of his top 2020 rivals.

Background: Trump told reporters this week that China should launch an investigation into Joe and Hunter Biden, though he clarified he hasn't yet asked Chinese President Xi Jinping to do so.

  • Trump also argued on Saturday that asking China to investigate the Bidens "pertained to corruption, not politics," and called Romney a "pompous ass" for his criticism.

Go deeper ... Senate's new maverick Republican: Mitt Romney and the whistleblower complaint

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Updated 7 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.