The House of Commons Special Committee on Electoral Reform (ERRE) was a special committee of the House of Commons of Canada established during the 42nd Canadian Parliament to investigate reforms to the Canadian electoral system. The formation of "an all-party Parliamentary committee to review... [electoral] reforms" was an election promise by Liberal Party leader Justin Trudeau in the 2015 federal election. After becoming Prime Minister, Trudeau indicated the formation of a special committee was a priority in his mandate letter for Minister of Democratic Institutions Maryam Monsef. Shortly after the committee submitted its report to parliament on December 1, 2016, Monsef was transferred to the position of the Minister of Status of Women and Karina Gould took over the electoral reform file. Shortly after taking her position Gould announced that the government would no longer be pursuing reform of the electoral system, stating "It has become evident that the broad support needed among Canadians for a change of this magnitude does not exist".
On May 10, 2016, Maryam Monsef gave notice in the House of Commons of the government's plans for the composition of the Special Committee. The initial proposed structure of the Special Committee was 10 voting members allocated based on each official party's seats in the House (6 Liberal members, 3 Conservative members, and 1 New Democratic member), with a member of the Bloc Québécois and Green Party leader Elizabeth May given additional non-voting seats. This was criticized by the opposition party leaders, as the government would have possessed a majority of the committee seats and could unilaterally recommend alterations to the electoral system without the support of any other party. Interim Conservative leader Rona Ambrose, the Leader of the Official Opposition, denounced the plan as "stacking the deck", while Nathan Cullen, the NDP critic for Democratic Institutions, urged the government to reconsider this plan as well. The Green Party and the Bloc Québécois additionally objected to their lack of voting representation on the committee.