Other opposition parties currently include the Liberals, led by Bob Rae, the Bloc â¦ Quebecois, led by Vivian Barbot, and the Green Party, led by Elizabeth May. Thomas Mulcair, Leader of Canada's New Democratic Party, is the Leader of Her Majesty's Loyal Opposition in Canada's House of Commons.He became the leader of the NDP on 2012 March 24, and the party's national convention, taking over from interim leader Nycole Turmel.+ 50 others found this useful.Ravikanth Sunny.he is federally represented by the Governor General, who performs ceremonial, constitutional, and state duties on the Queen â¦ 's behalf. Currently, the Governor General is David Johnston. The political leader of Canada is the Prime Minister, who is Canada's head of government and chairs the federal Cabinet.