Trump's Return from Walter Reed Leaves White House in Disarray

Prominent supporters of the administration said Mr. Trump should have stayed at the hospital until he was no longer infectious or should remain confined to his residence.

“When a boss comes down with Covid, whether that boss is the president, a C.E.O., a principal at a school, a union foreman on a shop floor, and the boss shows up for work, it sends a very worrisome message to all of those around the boss,” said Ari Fleischer, a former press secretary to President George W. Bush. “There is a community of people who work in the White House, not just political appointees. A good boss always takes care of his or her employees.”

Still unknown was the exact status of the president’s health. Dr. Sean P. Conley, the White House physician, said on Tuesday that the president “reports no symptoms” of the virus and that his vital signs were stable, but no one at the White House would say what the “expected findings” were on Mr. Trump’s chest X-ray that Dr. Conley had mentioned over the weekend.

There were no answers, either, on when Mr. Trump last tested negative for the virus — a crucial piece of information that the White House and Dr. Conley have refused to answer and would establish the known state of Mr. Trump’s health before the presidential debate last Tuesday or before he attended a fund-raiser in New Jersey on Thursday. The White House first made public that Mr. Trump had tested positive early last Friday.

Two officials maintained that Mr. Trump had been tested before the presidential debate, but the White House has yet to affirm that.

White House officials conceded on Tuesday that there had been an impression created that Mr. Trump was getting tested every day, and a reliance on testing as if it were a curative measure as opposed to a diagnostic.

Yet the president himself was not tested every day, according to two people familiar with the practices. A senior administration official would only say on Tuesday that Mr. Trump was tested “regularly.” Mr. Trump himself told reporters in the White House briefing room in July that “I do take probably on average a test every two days, three days.”