NYT: 

President Trump doubled down on Saturday in his feud with Canada over a television ad that used audio of former President Ronald Reagan denouncing tariffs, saying he would punish the country with an additional 10 percent tariff on its goods.

Mr. Trump had already suspended monthslong trade talks with Canada, the United States’ second-largest trading partner, on Thursday night because of the ad, which had been paid for by Ontario. Though the ad faithfully reproduced Mr. Reagan’s words, just in a different order, Mr. Trump has insisted it was “fraudulent” after the Ronald Reagan Presidential Foundation and Institute said it had made “selective” use of the five-minute original address.