Breakdown shows Washington now prioritises its own interests over any semblance of shared economic ground‘No more!!!’: Trump lashes out after US-Canada talks devolve into trade warThe calamitous collapse of trade negotiations between Canada and the United States is a warning to nations worldwide that pursuing any kind of dialogue with the current US administration is doomed at the outset, according to observers who say this recent episode indicates seeking a fair deal is futile.Andrea Lawlor