Canada is ready to respond to tariffs from its top trade partner the United States on Monday if President-elect Donald Trump follows through on his threat to impose them, Foreign Minister Melanie Joly said on Friday.

The government is preparing for the possibility that the incoming U.S. administration will impose high tariffs on Canadian goods, setting the close allies up for a showdown.

Canada is prepared to retaliate if President-elect Donald Trump imposes tariffs on the country. Canada’s Foreign Minister, Mélanie Joly, says if Trump does this, “he’s starting a trade war.”