[1] She has been a member of the Union French Democracy, of the National Rally and, as of 2023, of Reconquete.
In the 2017 French legislative election, Houplain was the substitute for Ludovic Pajot.
[2] She replaced Pajot as a MP after he was elected mayor of Bruay-la-Buissière.
[4] She sought re-election in the 2022 French legislative election under the Reconquête banner.
[6] The seat was won by National Rally candidate Thierry Frappé in the second round.