 The Liberals won a minority, and the NDP announced they would press for electoral reform through a referendum.The possibility of a national referendum on electoral reform was made more likely through the Throne speech that opened Parliament in October 2004, in which former Liberal Prime Minister Paul Martin included electoral reform in his plan for the next Parliament.However, after Conservative Leader Stephen Harper became Prime Minister as a result of the 2006 federal election, no moves toward reform of the electoral system were taken until Liberal Leader Justin Trudeau became Prime Minister after the 2015 federal election, in which Trudeau promised to eliminate the current "first-past-the-post" single-member plurality voting system.