Supreme Court explains why it invalidated Liberal MP's 1-vote win in 2025 election

Canada's top court says Elections Canada committed a serious administrative error capable of undermining the integrity of the electoral process when it failed to address problems with mail-in ballots in a Montreal-area riding ahead of the 2025 federal election.

The Supreme Court of Canada says it decided to invalidate a federal Liberal candidate's one-vote victory in the 2025 federal election to ensure public trust in the electoral process.