President Donald Trump's barrage of tariffs has quickly strained the United States' longstanding relationship with Canada over the last year.Since taking office in January, Trump has threatened Canada's economy and sovereignty with steep import taxes on its goods.

U.S. President Donald Trump said on Thursday all trade talks with Canada were terminated following what he called a fraudulent advertisement in which late President Ronald Reagan criticized tariffs.

He noted that economists widely believe that high tariffs of the Smoot-Hawley era had exacerbated the Great Depression, which he and others of his generation lived through – a painful memory that, he ...