Canada has strongly rejected US President Donald Trump's executive order to rename Lake Ontario as "Lake America", asserting that the waterway's historic 400-year-old name will persist.

• The US order directs federal agencies to use "Lake America", impacting official records within 30 days.
• Canadian Prime Minister Mark Carney emphasized the lake's name predates both Canada and the US Declaration of Independence.
• This renaming dispute escalates tensions amidst ongoing trade conflicts, including new 50% tariffs imposed by the US on Canadian goods.