He never claimed double allegiance. His parents moved back here when he was two or four (forget which he said), and America is all he has known. That piece of paper has nothing to do with his allegiance, but he is renouncing it for the benefit of those fussing about it. Officials in Canada said it hasn’t been done much, but can be done.
“He never claimed double allegiance”
He never had to because he was already born with Canadian Citizenship.