Thomas Joseph "Tom" Mulcair PC MP (born October 24, 1954) is the leader of the New Democratic Party of Canada, as well as the Leader of the Official Opposition in Canada. An NDP Member of Parliament for the electoral district of Outremont in Quebec since 2007, he was selected as the leader of the NDP at a leadership election on March 24, 2012, with 57.2% of the votes on the fourth and final ballot.A lawyer by profession, Mulcair joined the federal NDP in 1974.