2018 Territoire de Belfort's 1st constituency by-election

2018 Territoire de Belfort's 1st constituency by-election

28 January 2018 (first round)
4 February 2018 (second round)
Turnout29.51% 20.23% (first round)
28.91% 15.35% (second round)
 
Nominee Ian Boucard Christophe Grudler Anais Beltran
Party LR MoDem LFI
1st round
%
5,266
39.02% 15.32%
3,600
26.67% 5.16%
1,568
11.62% 0.55%
2nd round
%
7,229
58.93% 8.17%
5,039
41.07% 8.17%
Eliminated

 
Nominee Jean-Raphaël Sandri
Party FN
1st round
%
1,015
7.52% 9.98%
2nd round
%
Eliminated

Deputy before election

Ian Boucard
LR

Elected deputy

Ian Boucard
LR

The first round of a by-election was held in Territoire de Belfort's 1st constituency on 28 January 2018, with a second round on 4 February because no candidate secured a majority of votes in the first round. The by-election was called due to the invalidation of the election of Ian Boucard, candidate of The Republicans (LR), in the June 2017 legislative elections by the Constitutional Council on 8 December 2017, due to the distribution of misleading electoral leaflets by Boucard's campaign between the two rounds.

The by-election was the first since the election of Emmanuel Macron as president, and marked the first confrontation between The Patriots and the National Front (FN) since Florian Philippot quit the FN to found his own party.

In the first round on 28 January, Ian Boucard of The Republicans and Christophe Grudler of the Democratic Movement (MoDem) advanced to the second round, as they did in June 2017, with Boucard securing a far higher percentage of votes amid low turnout. Boucard won the second round of the by-election on 4 February by a margin of nearly 18 points.