3. “It is wrong for the president to have done this.”

That was the office of Theresa May, the British prime minister, amid the racially charged furor President Trump set off by retweeting video posts from an ultranationalist British party leader supposedly portraying Muslims committing acts of violence. (Above, Ms. May visiting Saudi Arabia on Wednesday.)

We examined the videos. At least one misrepresents the facts of what the viewer is seeing, while two others are provided without any of the necessary context.

In other news related to Mr. Trump and online videos, he’s now raising questions about the authenticity of the “Access Hollywood” tape, even though he apologized for it when it surfaced during the campaign.

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