Green Party leader Elizabeth May (R) speaks as Conservative leader and Prime Minister Stephen Harper (L), Bloc Quebecois leader Gilles Duceppe (2nd L) and New Democratic Party leader Thomas Mulcair look on during the French language leaders' debate in Montreal, Quebec September 24, 2015. Canadians go to the polls in a federal election on October 19, 2015. REUTERS/Christinne Muschi