Tatiana Auguste is the federal Liberal MP for Terrebonne (Quebec), originally elected at the April 28, 2025 federal election and re-elected at the April 13, 2026 byelection. The 2025 result in Terrebonne was annulled by the Supreme Court of Canada in early 2026 after the SCC found ballot-counting irregularities that affected the original 35-vote margin against Bloc candidate Nathalie Sinclair-Desgagne. The April 13, 2026 byelection re-elected Auguste with a wider margin, contributing to the Carney Liberal majority government secured that night. A first-time federal MP at the 2025 election. Before politics she was a small-business owner in the Terrebonne area and a community-association board member.