Justin Trudeau, leader of the Liberal Party of Canada, from left, Thomas "Tom" Mulcair, leader of the New Democratic Party, and Conservative Leader Stephen Harper, Canada's prime minister, stand for a photograph prior to the second leaders' debate in Calgary, Alberta, Canada, on Thursday, Sept. 17, 2015. The debate pits Harper and his Conservative Party's program of tax cuts and spending restraint against the Liberal Party's Trudeau who is pledging to raise taxes on the highest earners and Mulcair of the New Democratic Party who advocates increasing levies on corporations. Photographer: Ben Nelms/Bloomberg via Getty Images
