He also wrote (in the non-fiction 1995 book The Demon-Haunted World), “I have a foreboding of an America in my children’s or grandchildren’s time — when the United States is a service and information economy; when nearly all the key manufacturing industries have slipped away to other countries; when awesome technological powers are in the hands of a very few, and no one representing the public interest can even grasp the issues; when the people have lost the ability to set their own agendas or knowledgeably question those in authority; when, clutching our crystals and nervously consulting our horoscopes, our critical faculties in decline, unable to distinguish between what feels good and what’s true, we slide, almost without noticing, back into superstition and darkness.”
One problem is that a lot of manufacturing has left Canada. So, with an increase in demand for Canadian products, it would take a while to ramp up production. Most likely what will happen is that we would just import more from other countries (most likely China). And, then, much like what happened after the government injected cash into the economy during the pandemic, we’ll suffer more inflation than what is healthy for Canada.
If we had the manufacturing capacity to be self sufficient (oil refinement and gasoline production is a big one that we let USA do), then your idea might work.
However, I don’t think that Canada’s purchasing power (on an individual consumer level) is strong enough to put a dent into USA manufacturing sales… Our population is only approx 1/10th that of the USA.