Deborah Birx, the White House's coronavirus response coordinator, told NBC's "Today" Monday that a projection of 100,000–200,000 U.S. coronavirus deaths is based on the presumption that citizens follow social-distancing guidelines "almost perfectly."

Why it matters: Birx said she is unsure that people are following the guidelines and cited images circulating online of people around the world congregating in large groups.

What she's saying: "Cities that don't social distance, that don't stay at home, that believe you can have social interactions, that believe you can have gatherings at home of 20 and 10 people even — that is going to spread the virus, even if everyone looks well," Birx said.

The big picture: The U.S. has reported more than 143,000 cases and 2,500 fatalities from the coronavirus as of Monday morning, according to data from Johns Hopkins University.

Go deeper: Fauci says Trump backed off Easter reopening after seeing coronavirus projections

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Biden: The next president should decide on Ginsburg’s replacement

Joe Biden. Photo: Drew Angerer / Getty Images

Joe Biden is calling for the winner of November's presidential election to select Ruth Bader Ginsburg's replacement on the Supreme Court.

What he's saying: "[L]et me be clear: The voters should pick the president and the president should pick the justice for the Senate to consider," Biden said. "This was the position the Republican Senate took in 2016 when there were almost 10 months to go before the election. That's the position the United States Senate must take today, and the election's only 46 days off.

Trump, McConnell to move fast to replace Ginsburg

Photo: Alex Wong/Getty Images

President Trump will move within days to nominate his third Supreme Court justice in just three-plus short years — and shape the court for literally decades to come, top Republican sources tell Axios.

Driving the news: Senate Majority Leader Mitch McConnell and Senate Republicans are ready to move to confirm Trump's nominee before Election Day, just 46 days away, setting up one of the most consequential periods of our lifetimes, the sources say.

Updated 7 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 10 p.m. ET: 30,393,591 — Total deaths: 950,344— Total recoveries: 20,679,272Map.
  2. U.S.: Total confirmed cases as of 10 p.m. ET: 6,722,699 — Total deaths: 198,484 — Total recoveries: 2,556,465 — Total tests: 92,163,649Map.
  3. Politics: In reversal, CDC again recommends coronavirus testing for asymptomatic people.
  4. Health: Massive USPS face mask operation called off The risks of moving too fast on a vaccine.
  5. Business: Unemployment drop-off reverses course 1 million mortgage-holders fall through safety netHow the pandemic has deepened Boeing's 737 MAX crunch.
  6. Education: At least 42% of school employees are vulnerable.