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.

Canada’s governing Liberals are set to choose a replacement for Prime Minister Justin Trudeau. TORONTO — Canada's governing Liberals will announce a replacement for Prime Minister Justin Trudeau on Sunday as the country deals with U.S. President Donald Trump's tariff threats and as a federal election looms.

Canada's ruling Liberal Party elected a new party leader Sunday who will serve as the nation's next prime minister, replacing outgoing premier Justin Trudeau. Why it matters: Liberal Party members' vote for Mark Carney comes as the Liberal Party is experiencing a polling boost amid widespread opposition to President Trump's policies targeting its northern neighbor.