U.S. President Donald Trump has announced that he will impose 25 per cent tariffs on all aluminum and steel imports to the U.S., including those from Canada, on March 12. Here's the latest news: 7 a.m.

The 25 percent tariffs on imported steel and aluminum are the latest salvo in his ongoing effort to overhaul the U.S. trading relationship with the rest of the world.

United States President Donald Trump has signed executive orders to impose 25 per cent tariffs on steel and aluminium imports from March 12, despite warnings