The unannounced meeting comes days after President-elect pledged to enact crippling tariffs on Canada and Mexico over illegal immigration and drugs.

Canadian Prime Minister Justin Trudeau returned home Saturday after his meeting with Donald Trump without assurances the president-elect will back away from threatened tariffs on all products from the major American trading partner.

President-elect Trump boasts a "productive meeting" with Canada's Prime Minister Justin Trudeau after earlier threatening tariffs on the country, China and Mexico. Why it matters: Trump earlier promised to implement tariffs immediately, triggering fears of inflation and a trade war.