When national interests clash with free trade principles: Tom Campbell

Should the United States conduct an inventory of essential goods like petroleum, food and pharmaceuticals, and invest in building up capacity if not outright reserves in each?
If we don’t, we remain dependent upon foreign sources for our standard of living, and, in some cases, actual survival.
To take this step would run contrary to over 200 years of accepted economic doctrine that countries should rely on free trade between each other.
In 1817, the British economist David Ricardo publishe