Like today, timber, lumber and dairy were commodities of interest in trade negotiations in the nineteenth century.
The president has said the U.S. always loses in Canada-U.S. dispute resolution proceedings.
The Trump administration recently imposed an anti-dumping duty on Canadian softwood lumber exports.
President Trump called Canada’s system of supply management for dairy products a "disgrace."
Canada’s lumber companies deny that softwood lumber exports are subsidized by so-called stumpage fees.
U.S. importers and Canadian exporters have a strong shared interest in having the two governments reach a quick and durable settlement.
The U.S. has collected billions of dollars from duties imposed on Canadian lumber.
Both Hillary Clinton and Donald Trump are favouring the protection of U.S. domestic producers.