which american president banned christmas trees in the white house

Hmm, that would be Calvin Coolidge, the 30th President of the United States, who famously banned Christmas trees from the White House during his presidency from 1923 to 1929. However, the reason behind this ban is not entirely clear, as some reports suggest that he did not want to detract from the focus on his wife's contributions to the Christmas celebration. It's also possible that he may have had more personal reasons for his decision. But regardless of his motivations, the ban on Christmas trees in the White House remains a unique and interesting chapter in American history.