UPDATE 2-Canada's Trudeau tells metal workers: 'We have your backs'
March 12, 2018 at 19:40 PM EDT
MONTREAL, March 12 (Reuters) - Canadian Prime Minister Justin Trudeau promised aluminum and steelworkers on Monday he would defend them against possible U.S. tariffs and called U.S. President Donald Trump to stress that "mutually beneficial" cross-border supply chains should be preserved.