President Donald Trump said he was seriously considering renaming Lake Ontario amid worsening US–Canada trade tensions. The proposal is presented as a political provocation linked to threatened tariffs and stalled negotiations, while Canadian officials indicated they would continue using the existing name.

Lake Ontario lies across the US–Canada border, making any unilateral American name change unlikely to be accepted in Canada. Trump also threatened 50% tariffs on Canadian cars and car parts, and said the US did not expect to do much business with Ontario.