April 22, 2016 10:07 AM EDT

President Obama’s visit to the United Kingdom took a sour turn Friday as London Mayor Boris Johnson used Obama’s “part-Kenyan” background to dismiss the President’s opposition to Britain leaving the European Union.

Johnson penned an op-ed in The Sun slamming Obama’s opposition to the possible so-called “Brexit.” He painted Obama as at odds with British, repeating a previously debunked story about the President removing a bust of Winston Churchill from the White House when he took office.

“No one was sure whether the President had himself been involved in the decision. Some said it was a snub to Britain. Some said it was a symbol of the part-Kenyan President’s ancestral dislike of the British empire—of which Churchill had been such a fervent defender,” Johnson wrote. “Some said that perhaps Churchill was seen as less important than he once was. Perhaps his ideas were old-fashioned and out of date.”

The President traveled to London with the intention of supporting a “strong and United Kingdom in the European Union,” publishing an op-ed in The Telegraph ahead of his meeting Friday with Queen Elizabeth II.

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