Former Bank of England governor Mark Carney in pole position to become Canada's next prime minister

Former Bank of England governor Mark Carney is the front runner to succeed Canada prime minister Justin Trudeau 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. Picture: Alastair Grant/PA Wire

Canada's Liberal Party will announce Prime Minister Justin Trudeau's successor 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.

The next prime minister will have to negotiate with US President Donald Trump as he threatens additional tariffs on Canada and may soon face the opposition Conservatives in a general election.