As Donald Trump teases steeper tariffs on Canadian products, Canada readies its $37 billion in retaliatory measures and politicians begin debating the move. Targets will likely be critical minerals with national unity and economic ties to the center.

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.

Prime Minister Justin Trudeau says if “push comes to shove” Canada is ready. Ottawa has a set of retaliatory measures set to drop on Monday if Trump takes action, a senior federal source told POLITICO on the condition of anonymity because they were not authorized to discuss the details publicly.

Prime Minister Justin Trudeau met with his new Council on Canada-U.S. Relations seeking advice as Canada prepares to retaliate if president-elect Donald Trump imposes punishing tariffs on Canadian imports.