The U.S. has collected billions of dollars from duties imposed on Canadian lumber.
America's place as a world leader in economic freedom has faltered.
Canada raised tariffs in the 1930s and sunk into the Great Depression.
Both Hillary Clinton and Donald Trump are favouring the protection of U.S. domestic producers.
The U.S. trade deficit with Canada was around US$15.5 billion in 2015.
Canada, heavily dependent on trade with the U.S., likely stands to lose if campaign hostility towards free trade becomes a reality.
In any U.S.-led tariff-driven trade war, Canada would be collateral damage.
Chinese companies have recently made takeover offers for a U.S.-based technology products distributor and General Electric's appliance division.
Senator Sanders is an avowed protectionist, opposed to all future international trade deals and would renegotiate or scrap NAFTA and the Canada-U.S. FTA.