The news that US president-elect Donald Trump could slap a 25% tariff on Canadian goods upon taking office in January sent a jolt of alarm through the entire Canadian economy, but the alarm in the oilpatch has only deepened as Ottawa and the provincial governments threaten to target energy exports in retaliation. Energy producers and fuel companies on both sides of the border are growing concerned that commodity flows could be disrupted if a tit-for-tat trade war erupts. …Canada is reliant on U.S. demand for its energy exports, but U.S. refineries have also grown increasingly dependent on Canadian crude. …The federal government said it is also considering retaliatory measures, including an export tax on key commodities, such as oil, potash and uranium, according to Bloomberg. …Trump’s proposed tariffs are also expected to increase energy bills in the northeastern U.S. and to raise electricity costs on both coasts where U.S. consumers are reliant on electricity and natural gas imports from Canada.