President Donald Trump fired his first American diplomatic salvos against Canada early in his second, nonconsecutive term.

Hosting then-Canadian Prime Minister Justin Trudeau at his Mar-a-Lago home in Florida, Trump mused about making the northern neighbor of the United States a “51st state.” That February 2025 tête-à-tête between the North American leaders turned out to be the last of Trudeau’s decadelong run as Canada’s prime minister.