President Donald Trump asked the White House doctor to perform a cognitive exam during his physical last week, despite the doctor’s determination that such testing wasn’t necessary.

“I have no concerns about his cognitive ability,” Dr. Ronny Jackson told reporters on Tuesday.

He said the testing was conducted at the President’s wishes, and the results were normal.

Ahead of the exam, the White House said that tests for mental acuity would not be included.

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The question arose after a week of speculation about Trump‘s mental fitness for office, spurred by the publication of a damaging book that suggested Trump‘s own aides worry about his stability.