The leader of Canada’s top oil-producing province vowed to fight federal efforts to cut or tax crude exports to the US as a tactic in a trade war with the incoming Trump administration.

President-elect Donald Trump's threat of tariffs against Canada has resulted in a push in the country from the worlds of academia to politics to preserve, not punish, trade with the U.S.

The country’s leaders are trying to persuade the new administration to hold off while also seeking ways to inflict pain in a tariff spat.