The White House released a statement declaring that the United States offered Canada what it called the most preferential market access of any country on Earth, including cuts on steel, aluminum, autos, and lumber, and that Canada rejected the offer.
The release quotes President Trump calling Canada 'the most difficult and unreasonable' trading partner and declaring that Canada 'will be entitled no longer.' No details of Canada's stated objections, walk-backs, or the substance of its 'unreasonable demands' are provided.
The full dispatch is available from the source below.