Trade war turmoil is weighing heavily on financial markets in Canada. Canada’s main stock index has been tumbling along with U.S. indexes since President Donald Trump initiated a trade war with his North American neighbors.

The former central bank chief takes over at what he has called “a time of great peril” for Canada, with Trump attacking its sovereignty and economic security.

Despite emerging risks concerning U.S. domestic potash prices due to trade tensions with Canada, the rising costs of N-based fertilizers present a more immediate threat to U.S. agriculture, as these are closely linked to elevated domestic natural gas prices,