OTTAWA—Mark Carney won the leadership of Canada’s Liberal Party on Sunday, putting him in line to replace Prime Minister Justin Trudeau and call an election that suddenly seems winnable for the country’s center left.

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 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.