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.

Mark Carney, 59, replaces Prime Minister Justin Trudeau, who announced his resignation in January but remains prime minister until his successor is sworn in in the coming days.

With federal election polling showing a tighter race, the outcome of the Liberal leadership race just got a lot more interesting.