The Supreme Court of Canada has invalidated the outcome of a closely contested riding from the last spring’s election, leading to the necessity of a new byelection in the Terrebonne riding near Montreal. Initially claimed by the Bloc Québécois, the electoral district was later awarded to the Liberals by a single vote after a judicial recount.
The dispute arose after a voter, Emmanuelle Bossé, had her mail-in ballot returned due to a misprint on the return envelope, prompting the Bloc candidate, Nathalie Sinclair-Desgagné, to challenge the results. Elections Canada acknowledged the error but maintained that the results had been finalized.
Following the recount, Liberal Tatiana Auguste assumed office as the MP for Terrebonne. Despite a prior rejection by a Superior Court judge, Sinclair-Desgagné’s plea for a new election was approved by the Supreme Court after deliberations.
The court emphasized the importance of public participation and highlighted an Elections Canada employee’s error in printing incorrect postal codes on special ballots before the election. The Liberal Party respected the decision, expressing readiness for a byelection in Terrebonne.
Sinclair-Desgagné hailed the court’s decision as a victory for democracy, emphasizing the need for rectifying electoral mistakes. Elections Canada confirmed its compliance with the ruling and readiness to conduct a new election in Terrebonne.
This incident adds to the challenges faced by the Liberals, who were close to securing a majority but are now four seats away due to recent resignations and the Terrebonne controversy. Once the Speaker announces the vacancy, the government must wait a minimum of 11 days before calling a byelection.

