Canada's Liberal Party will announce Prime Minister Justin Trudeau's successor on Sunday as both party chief and head of the country's government in the midst of a trade war with the United States that could cripple the Canadian economy.

After decades of bilateral stability, the vote on Canada’s next leader now is expected to focus on who is best equipped to deal with the U.S.

Donald Trump confirmed Canadian imports would be subject to 25 percent taxes, risking retaliation from north of the border.