Corker speaks at a Trump rally in Nashville in March. Photo: Mark Humphrey / AP

President Trump took aim at Republican Sen. Bob Corker Sunday morning via Twitter, saying he lacked the "guts" to seek re-election after begging for an endorsement. This came a few days after Corker said he wouldn't support Trump's tax plan if it increased the deficit and said Secretaries Mattis and Tillerson, along with John Kelly, are helping to keep the U.S. from "chaos."

Corker then fired back: "It's a shame the White House has become an adult day care center. Someone obviously missed their shift this morning."

Corker was indeed in the running for secretary of state, and introduced Trump at a rally in March, speaking glowingly of him at that time. But he's been increasingly frustrated with Trump, particularly over a number of foreign policy moves and statements.

Why it matters: Corker is retiring — but not until January 2019. Until that time he's free to vote however he sees fit, and challenge Trump whenever he feels it necessary.

Go Deeper: A Corker ally on his thinking.

Go deeper

11 mins ago - Health

Fauci: Trump hasn't been to a COVID task force meeting in months

Photo: Drew Angerer/Getty Images

President Trump has not attended a White House coronavirus task force meeting in “several months,” NIAID director Anthony Fauci told MSNBC on Friday.

Why it matters: At the beginning of the pandemic, the task force, led by Vice President Mike Pence, met every day, but in the "last several weeks," members have held virtual meetings once a week, Fauci said, even as the number of new cases continues to surge in the country.

52 mins ago - Health

How to help save 130,000 lives

People wear face masks outside Grand Central Terminal in New York City. Photo: Noam Galai/Getty Images

Nearly 130,000 fewer people will die of COVID-19 this winter if 95% of Americans wear face masks in public, according to research published Friday.

Why it matters: “Increasing mask use is one of the best strategies that we have right now to delay the imposition of social distancing mandates," Dr. Christopher Murray of the University of Washington told the N.Y. Times.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Politics: Trump claims COVID "will go away" during debate.
  2. Sports: The youth sports exodus continues — Big Ten football is back.
  3. Health: FDA approves Gilead's remdesivir as treatment How the pandemic might endMany U.S. deaths were avoidable.
  4. Retail: Santa won't greet kids at Macy's this year.
  5. World: Spain and France exceed 1 million cases.