Canadian Prime Minister Justin Trudeau is being prodded by one of his country’s regional heads to retaliate against President Trump’s tariffs on Canadian lumber by imposing a ban on U.S. coal.

British Columbian Premier Christy Clark pressed Trudeau on Wednesday to enforce a trade ban on shipments of thermal coal, also called steam coal, at its terminal in Vancouver in response to the Trump administration’s 24 percent tariffs on Canadian softwood lumber imposed Tuesday.