The leader of Ontario, Canada’s most populous province, has kicked off his provincial election campaign, saying he needs a strong mandate to fight the tariffs threatened by U.S.

President Donald Trump’s repeated threats to slap steep tariffs on Canada and other friendly nations have left Toronto with some of the world’s worst-performing oil and gas stocks.

Chrystia Freeland, the former finance minister who is running to replace Justin Trudeau as Canada's prime minister, says her country needs to release a “retaliation list” of goods the country would target if U.