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

The killing of Iran’s top nuclear scientist is likely to impede the country’s military ambitions. Its real purpose may have been to prevent the president-elect from resuming diplomacy with Tehran.

The intelligence finding that Russia was most likely paying a bounty for the lives of American soldiers in Afghanistan has evoked a strange silence from President Trump and his top national security officials on the question of what to do about the Kremlin’s wave of aggression.

Mr. Trump insists he never saw the intelligence, though it was part of the President’s Daily Brief just days before a peace deal was signed with the Taliban in February.

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.

Members of the Transatlantic Strategy Group in Harvard Kennedy School's Project on Europe and the Transatlantic Relationship and the German Council on Foreign Relations (DGAP) tell us how they see the COVID-19 pandemic affecting the U.S.-Europe relationship. Their answers highlight implications for a range of issues — trade, health, security, governance, Brexit, climate change and China — and what actions can be taken to enhance transatlantic cooperation in this moment of crisis.

The secretary of state is preparing an argument that the U.S. remains a participant in the Obama-era nuclear deal, with the goal of extending an arms embargo or destroying the accord.

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.

President Trump’s refusal to invoke the Defense Production Act to commandeer resources for the federal government is based on a bet that he can cajole the nation’s biggest manufacturers and tech firms to come together in a market-driven, if chaotic, consortium that will deliver critical equipment — from masks to ventilators — in time to abate a national crisis.