 He was elected by acclamation as a Liberal to the House of Commons of Canada in the riding of Jacques Cartier in a 1922 by-election.He was re-elected in the 1925 and 1926 federal elections twice defeating Esioff-Léon Patenaude who was Conservative leader Arthur Meighen's Quebec lieutenant and Justice minister.However, Rhéaume lost his seat in the 1930 federal election.