Canadian politicians say President Donald Trump can rename Lake Ontario on the map if he wants to — it won’t change what they call it.

In a Tuesday morning Truth Social post, Trump wrote that the US is “giving serious consideration to changing the name of Lake Ontario to Lake America” as “we don’t expect to be doing much business with Ontario any longer.”

He later posted a picture of the map of Lake Ontario with its name crossed out and replaced by “Lake America” in a bold metallic font. His threat comes as trade tensions between the two countries flare.

But Canadian politicians shrugged off Trump’s message.

Talking about Trump, Ontario Premier…