Marc-Boris St-Maurice is the founder of the Marijuana Party of Canada and led it from 2000 until 2005. He has contested two general elections, and two by-elections:

• September 11, 2000: In the riding of Okanagan—Coquihalla , St-Maurice finished 6th place out of 8 with 438 votes, and he ran as an indepenedent. Stockwell Day of the Canadian Alliance was elected.
• Canadian federal election, 2000: In the riding of Laurier—Sainte-Marie, St-Maurice finished in 4th place with 2,156 votes behind Gilles Duceppe of the Bloc Québécois, Jean Philippe Côté of the Liberal Party of Canada, and Dylan Perceval-Maxwell of the Green Party of Canada.
• May 13, 2002: In the riding of Saint-Léonard—Saint-Michel, St-Maurice finished in last place with 197 votes. Massimo Pacetti of the Liberals would win.
• Canadian federal election, 2004: St-Maurice ran in the riding of LaSalle—Émard against incumbent and current Prime Minister of Canada, Paul Martin.

St-Maurice was also a member of the rock band Grim Skunk from 1988 to 1999. He's also the founder of the Bloc pot, which he led from 1998 to 2000.

On February 28 2005, St-Maurice announced his resignation as Marijuana Party leader. He announced that he was joining the Liberal Party of Canada, with the goal of working from within the governing party for liberalized marijuana laws.