The 2017 New Democratic Party leadership election will take place between October 1 and October 29, 2017 due to incumbent Tom Mulcair having lost a vote on a leadership review at the New Democratic Party's federal convention held in Edmonton, Alberta on April 10, 2016. 52% of delegates voted in favour of holding a new leadership election, compared to 48% who voted for Mulcair's leadership to continue. Under the party's constitution, the leadership election was to be held by April 10, 2017; however, the delegates present passed a motion to give the party up to 24 months to organize a leadership election. Mulcair is expected to remain interim leader until his successor is elected.