https://www.washingtonpost.com/posteverything/wp/2015/10/09/the-extreme-lengths-canadians-will-go-to-keep-americans-out/
October 9, 2015
Imagine the flood of political refugees, he told readers, in the case of a Donald Trump victory in the U.S. presidential election, “millions of shocked American Democrats and other Trump-dodgers fleeing across our Canadian border, seeking political refugee status here in the land of the free(ze).”
A Globe and Mail editorial expressed support for construction of the Great Wall of Canada. “Walls have demonstrated their usefulness throughout history, from the Ming dynasty to Game of Thrones,” it said.
“It’s time to build a wall – the higher the better.”
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Zim: Note that this article was October 2015.
(I haven't found anything recent - yet.)

Mad Poet Strikes Again.