The countries will negotiate next week through intermediaries in Vienna to try to bring both back into compliance with the 2015 nuclear agreement.

The State Department inspector general fired by President Trump on Friday was in the final stages of an investigation into whether the administration had unlawfully declared an “emergency” last year to allow the resumption of weapons sales to Saudi Arabia and the United Arab Emirates for their air war in Yemen.

President Trump insists that choosing when to reopen the economy is “the biggest decision I’ve ever had to make,” and, in the short term, he is undoubtedly right. It is a perilous balance of public safety versus economic revival that would test any president, even one not consumed by a looming election.

For a leader who has embraced the language of a wartime president, it is as if the Pentagon asked for missiles and bombers but wouldn’t say how many or where they should be delivered.

President Trump on Sunday night said that the government would reassess the recommended period for keeping businesses shut and millions of workers at home after this week, amid millions of job losses caused by the efforts to contain the spread of the novel coronavirus.

The United States, China and Europe are battling to be the first to find a cure, bringing a nationalist element to a worldwide crisis.

When Secretary of State Mike Pompeo, in a curse-laden tirade to a reporter on Friday, asked, “Do you think Americans care about Ukraine?” he was getting at an essential element of President Trump’s defense in the impeachment trial. White House officials are convinced that Americans are indifferent to what happens in the struggling former Soviet republic, and they may well be right.