Overview

• Final first-round tallies show Michel Barnier at 45.2% and Frédérique Bredin at 31.4%, with RN’s Thierry Mariani at 7.5% and Reconquête’s Hilaire Bouyé at 6.0%, on 26.18% participation.
• A second round is required because Barnier neither surpassed 50% of votes nor reached support from at least 25% of registered voters.
• The by-election followed the Conseil constitutionnel’s annulment of Renaissance deputy Jean Laussucq’s 2024 victory for campaign finance irregularities.
• Les Républicains hailed a strong lead and pressed supporters to turn out, as Bredin urged a consolidated left to contest the seat.
• Rachida Dati abandoned a rival bid after securing LR’s 2026 Paris mayoral backing, and a Barnier win would likely make him the party’s sole deputy from the capital.