Because after the US threatened to destroy our economy and/or annex us by force and/or cancel nu-NAFTA and/or impose tariffs on us regardless, we realized that Americans don't actually want us as friends so we started diversifying our trade partnerships and negotiated a mutual tariff relaxation deal with China.

The previous Canada-US relationship is gone. Months ago I wrote on HN that purely by virtue of having to weather this storm, the nature of Canada-US relations will be irrevocably and fundamentally altered. Even if Trump and his cronies were jailed tomorrow, it's too late. The rest of the world understands that Trump is just a symptom of the disease affecting America and it's going to get worse, not better.