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On Tuesday evening, senior administration officials confirmed that Stephen Miller, Mr. Trump’s top speechwriter and a policy adviser, had tested positive for the coronavirus, joining a growing list of Mr. Trump’s close aides who have the virus.
“Over the last five days I have been working remotely and self-isolating, testing negative every day through yesterday,” Mr. Miller said in a statement. “Today, I tested positive for Covid-19 and am in quarantine.”
Mr. Miller is married to Katie Miller, Vice President Mike Pence’s communications director. A senior administration official said Ms. Miller, who contracted the virus this spring and returned to work in May, was tested Tuesday morning and was negative for any new infection.
On Tuesday, many White House offices were empty as officials stayed home to wait out the infectious period from an outbreak of the coronavirus within the building and among people who had been there.
President Trump was in the White House residence, convalescing, as a number of advisers and other officials stayed home, either because they had contracted the coronavirus or had been near people who did.
The White House communications and press shops were bereft of people. The White House press secretary, Kayleigh McEnany, announced on Monday that she had tested positive. Two other press office aides have also contracted the virus, and two more aides on Tuesday were said to have tested positive, people familiar with the results said.
The outbreak in the White House, which has extended to some lawmakers on Capitol Hill, has raised concerns in the city that surrounds it. Washington, D.C., which has managed to bring infection rates down in recent weeks through preventive laws and high rates of compliance, has almost no control over the federal government.
The city reported 105 new coronavirus cases on Tuesday, the highest number since June 3.
The gathering at the Rose Garden would have violated the city’s mandates limiting the size of gatherings and requiring masks. But because the White House is on federal property, it is exempt from such rules.
City officials said they would be closely monitoring infection trends for several days to see if the Capitol and White House cases affected the city’s overall infection rate.
The White House physician, Dr. Sean P. Conley, said on Tuesday that President Trump was experiencing no symptoms of Covid-19 and doing “extremely well” on his first full day at home since a three-night stay in the hospital.
But outside doctors and medical experts in Covid-19 and lung disease said they were struggling to piece together an accurate picture of Mr. Trump’s health. Far from having vanquished Covid-19, the outside experts said, Mr. Trump is most