U.S. President Donald Trump has signed an executive order that will impose tariffs of 50 per cent on a wide range of Canadian exports, a dramatic ramping up of his trade war against his northern neighbour.

The tariffs will apply to goods covered by the Canada-U.S.-Mexico Agreement, escalating a trade dispute the White House says stems from Canada's policies targeting American autos,…

WASHINGTON - U.S. President Donald Trump is signing an executive order today to hammer certain Canadian products with 50 per cent tariffs in 30 days, senior White House officials…