The province of Ontario was named after the lake, not the other way around.
If Trump wants to tweak the Canadians fine, but after the Gulf of America, it just doesn’t have the same impact.
He should also consider that Ontario is the smallest of the Great Lakes and only Lake Erie is shallower.
But I suppose he could not in good taste call it Lake Trump.
“The province of Ontario was named after the lake”
That makes it even better. The province just lost its name sake. We should refer to Ontario as America now :-)