How about passing laws allowing Canada to seize and nationalize the assets and infrastructure of any corporation found participating in disinformation that favours a hostile foreign power? Forced "Canadianization" of American corporations operating in Canada in the event of any attempts at economic annexation. Asset, infrastructure, and operations seizure and nationalization for foreign corporations who violate Canadian labour standards (e.g., Amazon), as well as immediate claw-back of any incentives provided for those corporations.

I'm sure Canadian teams could be used to run those seized operations either in the interim until hostilities are verifiably over, or permanently, for the betterment of the Canadian economy.