If Ontario carries through on its threats, millions of Americans would be without electricity and major oil pipelines would be shut off. Trade wars between neighbors are the dumbest wars. Source: WWNY ONTARIO, Canada (WWNY) - Canada appears ready to fight back if President-elect Donald Trump’s tariff threat becomes real. Premiers from all over the country met in Ottawa this week, and Ontario Premier Doug Ford came out of the meeting and didn’t mince words. Ford emerged from the meeting where Canadian leaders talked about tariffs he’s certain are coming from the U.S.