Front-runner Mark Carney and underdog Chrystia Freeland, both established, centrist policymakers, are vying to succeed Justin Trudeau amid grave threats to Canada from the United States.

Frontrunners include Chrystia Freeland and Mark Carney, who are making the case they can guide Canada through domestic and international issues. At the top of the list: mounting trade tensions with the United States.

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.