THE BURNED OVER DISTRICT

And once again he has shot off his mouth about an event in Britain of which he knew little or nothing about. More likely nothing as the British no longer share intelligence about terrorists until they have been put away.

President Trump on Friday suggested British intelligence officials were aware of the assailant or assailants behind an unfolding terrorist attack on the London subway, an assertion that British officials called unhelpful speculation.

Prime Minister Theresa May alluded to Mr. Trump’s Twitter post in an interview with reporters, saying, “I never think it’s helpful for anybody to speculate on what is an ongoing investigation.”

Another attack in London by a loser terrorist.These are sick and demented people who were in the sights of Scotland Yard. Must be proactive!

— Donald J. Trump (@realDonaldTrump) September 15, 2017

Later on Friday morning, Mr. Trump said he had been briefed on the London terror attack, and he later spoke with Mrs. May by phone. According to the White House, Mr. Trump expressed sympathy for the people injured and promised to continue working with the British to fight terrorism. The White House summary of the call did not address whether Mr. Trump and Mrs. May discussed the president’s tweet about Scotland Yard.

The small explosion on a crowded Underground train during morning rush hour in the capital on Friday wounded at least 22 people, and the authorities in the city said they were treating the incident as terrorism. It was not immediately clear who was behind the attack or whether the assailant or assailants had been on the radar of British intelligence, as Mr. Trump suggested.

In short remarks to reporters on Friday morning, Mr. Trump said he had been briefed on the explosion but did not elaborate on what he meant in his reference to Scotland Yard.

No doubt the reference to Scotland Yard was something he heard on Fux & Fiends. More seriously, we hope he didn't worry about having to re-measure his Scottish golf course in Scotland Yards.