The provinces would whine, but Canada should accept any refugee claimants from the US. 11 million new people contributing to the country. That's 2-3 new major cities and all the investment that goes with it and building those cities. Think of how many gloss reports about high speed trains to connect them we could print if we added that much to our GDP overnight.
https://www.cbc.ca/news/politics/trump-canada-u-s-border-1.7438813
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