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 prominent central banker and investor was chosen in a crucial leadership race amid threats from President Trump. He is expected to quickly call a federal election.

The four candidates vying to become the next leader of Canada’s Liberal party have made the case during a debate why they are best suited to deal with U.S.