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.

The Liberal Party of Canada will announce its new leader — and Canada's next prime minister — Sunday evening after a six-week sprint following Prime Minister Justin Trudeau's announcement that he plans to step down from his role once his successor is chosen.