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Good morning.

Here’s what you need to know:

Image Credit... Mike Stocker/South Florida Sun-Sentinel, via Associated Press

• The U.S. military provided the fullest explanation so far from the Trump administration about a deadly ambush in Niger this month that killed four American and four Nigerien soldiers. It is still unclear why the soldiers waited one hour before they called for help.

President Trump took to Twitter to reject criticism by the widow of one of those killed in the ambush. She said that Mr. Trump had blundered through his condolence call to her, struggling to remember her husband’s name. We collected reactions on the controversy from the American left and right.

Separately on Twitter, Mr. Trump effectively halted a plan that Republicans were considering to help pay for a $1.5 trillion tax cut.