She was an Action démocratique du Québec (ADQ) Member of the National Assembly for the electoral district of Deux-Montagnes from 2007 to 2008.
Leblanc was nominated as an ADQ candidate for the 2007 election, after Jean-François Plante's candidacy was dismissed by his own party.
Plante, a former Vision Montréal Councillor in Montreal, had made a controversial statements about women's rights and accused openly gay Parti Québécois (PQ) leader André Boisclair of taking advantage of his sexual orientation.
[2] She campaigned on behalf of local Conservative candidate Claude Carignan during the federal election of 2008.
[3] Carignan finished a distant second against Bloc Québécois candidate Luc Desnoyers in the district of Rivière-des-Mille-Îles.