Former Bloc MP who lost by single vote says she will appeal to Supreme Court

The Bloc Quebecois is appealing the one-vote loss in Terrebonne to the Supreme Court of Canada.

MONTREAL — The former Bloc MP who lost her Quebec riding by a single vote is taking the matter to the Supreme Court of Canada.

Nathalie Sinclair-Desgagné says she will appeal a recent Quebec Superior Court decision that rejected her request for a new election in the Montreal-area riding of Terrebonne.

She had challenged the result after a Bloc voter revealed that her special ballot was not counted and instead returned to her because of an error in the address on the envelope provided by Elections Canada.

But a judge ruled last week that the mistake was a simple human error that did not warrant annulling the election.

Sinclair-Desgagné says the case is about the accountability of democratic institutions, and she has launched an online fundraiser to help cover the costs of the legal challenge.

She lost the April 28 election by one vote to Liberal MP Tatiana Auguste.

RELATED STORIES:

• Judge rejects request by Bloc Québécois for new vote in Terrebonne
• Unreasonable to cancel election won by single vote, lawyer for Liberal MP says
• Lawyer for Bloc candidate who lost by one ballot urges court to annul vote

This report by The Canadian Press was first published Nov. 3, 2025.