Abbas Araghchi, the minister, said the two sides had agreed to continue negotiations at a later date. The U.S. delegation had yet to comment.

When the New England Patriots take the field on Sunday, a collective sigh will rise from the willful few who live in the region but root for other teams.

The White House press secretary had dismissed criticism of the clip’s racist content as “fake outrage.” But later Friday, the clip disappeared from the president’s social media feed.