U.S. President Donald Trump accused Canada of “cheating” in a post on Truth Social, claiming the country “fraudulently took a big buy ad” misrepresenting former president Ronald Reagan’s stance on tariffs.

Trump wrote that Canada is “trying to illegally influence the United States Supreme Court in one of the most important rulings in the history of our Country,” and accused Canada of long “cheating on tariffs,” charging American farmers “as much as 400%.”

He thanked the Ronald Reagan Foundation for “exposing this fraud,” ending his post with “MAKE AMERICA GREAT AGAIN!!!”