There are countries, like China, who are in a period of population decline. If you have less people YoY and your population is weighted towards retirement age i

There are countries, like China, who are in a period of population decline. If you have less people YoY and your population is weighted towards retirement age it can spiral to where the entities producing things produce less each year and foreign businesses/countries buying those things will find them elsewhere. Mexico's population is growing, younger and much closer for trade and friendlier to the US. Its almost inevitable that the trade relationship strengthens amongst Mexico, US and Canada. If you were playing the game Civilization, North America is more self-sustainable than other continents as far as access to materials, food, water, etc. goes. Easier to defend as well with friendly neighbors. Countries with population decline (Russia is in this boat as well and then throwing their young males into war which might compound population decline) can't reverse that very quickly - there are "boomer" populations all over the globe at various stages entering retirement age (i.e. not working and not spending) with younger generations being much smaller in size. I think the pandemic threw a brick on the accelerator for shaking up trade relationships when people realized how just-in-time doesn't work well when things get disrupted.