UK Prime Minister Theresa May shot down concerns about President Trump’s mental fitness on Sunday, saying he acts in the best interests of his country.

May was forced to comment on Trump’s mental state following the release of Michal Wolff’s explosive book claiming some Trump advisers openly questioned the president’s mental capacity for the job.

Speaking with the BBC, the prime minister shot down any accusations against Trump, saying “no” to question if concerns about Trump’s mental fitness were serious.

“When I deal with President Trump what I see is somebody who is committed to ensuring that he is taking decisions in the best interests of the United States,” she added.