US President Donald Trump on Tuesday floated the idea of renaming Lake Ontario as “Lake America” as the trade dispute between the United States and Canada intensified. Trump linked the suggestion to the worsening economic relationship between the two countries, where both governments are preparing further measures amid an escalating tariff dispute.

“The United States is giving serious consideration to changing the name of Lake Ontario to Lake America,” Trump said in a social media post, arguing that Washington no longer expected to conduct significant business with Ontario. Ontario is Canada’s most populous province and has a major role in the country’s automobile industry and broader manufacturing sector.

The proposed name change would echo Trump’s earlier decision to rename the Gulf of Mexico as the “Gulf of America” through executive action. The latest remarks came as Canada prepared retaliatory measures against new US tariffs. The Trump administration recently imposed 50% tariffs on $20 billion worth of Canadian goods after negotiations between Washington and Ottawa broke down.

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Trade tensions between the neighbouring countries have also expanded to key industrial sectors. Trump has threatened additional 50% tariffs on Canadian vehicles, auto parts and steel, while Canadian Prime Minister Mark Carney has accused the US administration of seeking to weaken Canada’s major industries. Carney has rejected what he described as an approach that treats Canada as subordinate to the United States.

The dispute has raised concerns for businesses and consumers because the US and Canada have deeply integrated supply chains covering automobiles, energy, agriculture and manufacturing. Business owners on both sides of the border face uncertainty over higher costs and potential disruptions. Canadian officials are also considering measures to support workers affected by the tariffs as Ottawa weighs how to respond.

Carney indicated that Canada may move away from matching US tariffs on a dollar-for-dollar basis and instead adopt targeted measures designed to protect Canadian businesses and workers. He also criticised US demands during negotiations, particularly regarding the automobile, steel and aluminium industries. With both governments maintaining firm positions, the trade dispute is creating growing uncertainty across one of the world’s largest bilateral trading relationships.

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