Canadian Prime Minister Justin Trudeau warned that “everything is on the table” regarding retaliatory measures to President-elect Donald Trump’s threatened tariffs.

Trudeau made the announcement at a news conference in Ottawa, surrounded by members of his government and the leaders of most of Canada’s provinces and territories. If Trump follows through on his threat to slap a 25% tariff on all Canadian imports, Ottawa is planning to restrict Canadian exports of energy and key materials, along with tariffs of its own.