In his latest move, President Trump said he would impose an additional 25% tariff on Canadian steel and aluminum, as he upends diplomatic relations with major trading partners.

It seemingly began after the election, when the president floated the idea of annexing Canada in a meeting with outgoing Canadian prime minister Justin Trudeau. Though this appeared to be a joke at the time,

Canada will announce Canadian $29.8 billion or $20.7 billion in retaliatory tariffs in response to the 25% steel and aluminum tariffs that U.S.