A senior administration official said the two sides were “not quite at the finish line yet.”

Mr. Trump said that Iran was close to signing a peace deal. So far, weeks of talks have failed to produce an agreement.

© Eric Lee for The New York Times

A U.S. military official said the president’s seemingly dramatic announcement on Wednesday referred to a previously reported effort to shepherd commercial vessels through the Strait of Hormuz.

© Reuters

President Trump said that the Iranians were taking “too long to negotiate” a deal to end the conflict launched by the United States and Israel four months ago.

© Arash Khamooshi/Polaris for The New York Times