Canada urged to walk away from NAFTA talks over US steel tariffs

The largest private sector union in Canada on Friday called on this country to walk away from continental trade talks in protest if Washington slaps tariffs on steel and aluminum imports.At the same time, Prime Minister Justin Trudeau warned that the proposed US levies would cause significant pain on both sides of the border."If Canada fails to obtain an exemption from unjust and punitive tariffs on steel and aluminum exports to the US, then the Canadian government has no choice but to withdraw