Trade negotiations between countries broke down last month, leading to a series of tariff threats. Canada has implemented retaliatory tariffs on US products. This move comes after trade talks failed to produce an agreement, resulting in a tit-for-tat exchange of tariff threats.

Further details on the situation are available from the source. The breakdown in trade negotiations has led to an escalation of tensions, with warnings of further action. The source provides more information on the current state of trade relations and the potential for escalation.