TORONTO - The loonie fell against the U.S. dollar in late-morning trading as the U.S. imposed 50 per cent tariffs on roughly $28 billion worth of Canadian goods and President

Canadian Prime Minister Mark Carney vows to retaliate, says his country recognized that 'America has changed' and that the two countries would 'not return to our old relationship'

The United States imposed 50% tariffs on $20 billion worth of Canadian products early Saturday, and Canada immediately said it would retaliate, after last-ditch negotiations…