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A long-running row between Washington and Ottawa over trade has spilled into the naming of a shared Great Lake, after Ontario's premier, Doug Ford, unveiled a large sign on the Canadian shoreline reaffirming that the body of water is called Lake Ontario. The gesture came days after Donald Trump signed an executive order directing US federal agencies to refer to the lake as "Lake America", the latest flashpoint in a dispute that began when trade negotiations broke down and Washington imposed 50% tariffs on roughly $20bn (about C$28bn) of Canadian goods, prompting Canada to promise matching countermeasures.

Trump's order instructs the US Department of the Interior to update the lake's designation with the federal Geographic Names Information Service within 30 days, and he declared the change effective immediately. However, a US president's authority extends only to how federal bodies refer to a landmark domestically; it does not bind Canada, other governments or international mapping conventions, and Ottawa has given the move short shrift. Trump has continued to press the point on social media, sharing AI-generated clips of himself knocking down a Lake Ontario sign and erecting one reading "Welcome to Lake America", as well as a video depicting geese with his hairstyle patrolling the shore armed with rifles.

Ford unveiled his sign at a lakeside conservation area, framing it as proof that Canadians would not be intimidated. He argued that Trump's push to rename the lake stemmed from irritation at Ontario and Canada refusing to be pushed around, and said the marker was there to remind Trump and anyone else that the lake had been called Lake Ontario long before his presidency and would remain so long after it. His comments echoed an earlier statement from Prime Minister Mark Carney, who noted that the name derives from the Wendat word Ontari'io, roughly meaning "beautiful, big lake", and predates both Canadian confederation and American independence by centuries; Carney also took a pointed swipe at the pace of change in US policy more broadly, from trade to place names.

The dispute revives a similar episode from earlier in Trump's presidency, when he ordered the Gulf of Mexico be referred to as the "Gulf of America" for US purposes, a change Mexico rejected and which triggered a separate legal wrangle with Google over how the water was labelled on its maps — a compromise under which the name shown depends on the user's location. Most of the Great Lakes, including Ontario, Huron, Michigan and Erie, carry names rooted in Indigenous languages, while Lake Superior's name comes from an anglicised French term. As things stand, the practical effect of Trump's order is largely symbolic within the United States, while Lake Ontario continues to be recognised under its historic name everywhere else, including by the Canadian province it borders alongside New York state.

Where outlets differ

One account (styled closer to a wire/broadcast report) gives more background context — the tariff figures behind the trade dispute, the 30-day deadline for updating the US Geographic Names Information Service, the Indigenous origins of the Great Lakes' names, and the earlier Gulf of Mexico/Google Maps precedent.

The other account (drawing on the Globe and Mail) provides more scene-setting detail, specifying the sign was unveiled at the 50 Point Conservation Area in Hamilton, and includes a fuller Carney quote citing the Wendat-language origin of 'Ontario' and its age relative to Confederation and US independence.

Framing differs slightly: one report leans on Ford's 'never back down from a bully' language emphasising defiance, while the other foregrounds the mechanics and limits of Trump's executive order.

• www.bbc.co.uk
• www.dailymail.com