 Dubé left federal office on 17 March 2003 to seek the seat of Chutes-de-la-Chaudière in that year's provincial election with the Parti Québécois, but lost to Marc Picard.In the 2015 Canadian federal election, Dubé sought election in Bellechasse—Les Etchemins—Lévis as a candidate of the Bloc Québécois.The seat was held by the Conservative Party's Steven Blaney.