[3] The RSC was defeated in this election but later formed a de facto majority on council in alliance with five defectors from the governing Mouvement pour une école moderne et ouverte (MÉMO).
[4] Thériault later became a founding member of the Collectif pour la réussite et l'épanouissement de l'enfant (CRÉE), a successor party to the RSC.
Gérald Tremblay's Montreal Island Citizens Union (MICU) won a majority in this election, and Thériault served as a member of the opposition.
In November 2005, Tremblay appointed Thériault as one of two opposition members on a fifteen-member island council responsible for services such as public transit and the police.
[10] In the buildup to the 2009 municipal election, Thériault lost her bid for renomination as Vision Montreal's borough mayor candidate to Réal Ménard, a Bloc Québécois (BQ) member of the House of Commons of Canada.
[15] Tremblay removed Thériault from the executive committee on March 22, 2011, after she and sixteen other Vision Montreal councillors were cited by Quebec's chief electoral officer for illegal loan guarantees in the 2009 election.
[18] Thériault ran as a Quebec Liberal Party candidate in a provincial by-election in Bourget in 2008, centring her campaign around what she described as "a pro-family theme.