Trump last month delayed the implementation of the 25% tariff against goods from neighboring countries when Canadian Prime Minister Justin Trudeau and Mexican President Claudia Sheinbaum rushed to reassure him they would crack down on illegal immigration and fentanyl smuggling.

Trump's threats to put tariffs on imports from Canada and Mexico have weighed on markets, even though there has been considerable uncertainty over whether he would make good on his threat.

Canada is both the largest source of imported goods to Maine and the state's biggest export market, accounting an estimated $6 billion in cross-border trade last year.