Canadian Prime Minister Justin Trudeau is returning home 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.

Canadian Prime Minister Justin Trudeau says he had an “excellent conversation” with Donald Trump in Florida after the president-elect’s threat to impose significant tariffs on two of America’s leading trade partners raised alarms in Ottawa and Mexico City.

President-elect Trump’s pledge to impose tariffs on Mexico and Canada threatens to upend decades of North American integration, a bumpy process that’s recast the two U.S. neighbors as providers of raw and finished goods for the world’s biggest economy.