Proulx campaigned on behalf of local Conservative candidate Claude Durand during the federal election of 2008.
In the 2007 provincial election, Lévesque's preference for ADQ candidate Sébastien Proulx was not formally announced, but was not a secret for most observers.
Sébastien Grosjean | Sébastien Érard | Saint-Sébastien-de-Morsent | Sébastien Viars | Sébastien Faure | Sébastien Demorand | John Proulx | Sébastien Le Prestre de Vauban | Patrick Sébastien | Louis-Sébastien Lenormand | Stade Sébastien Charléty | Sebastien Vorbe | Sébastien Proulx | Sébastien Masi | Jean-Sébastien Giguère | Jean-Nicolas-Sébastien Allamand | Sébastien Tellier | Sébastien Socchard | Sebastien Michaelis | Sébastien Lespès | Sébastien Le Prestre de Vauban | Sébastien Lareau | Sébastien Japrisot | Sébastien Foucan | Sébastien Chabal | Sebastien Chabal | Sébastien Bourdon | Sébastien Bourdais | Sebastien Boucher | Sébastien Berthet |
In the 2007 Quebec elections, Gabias lost the seat to the Action démocratique du Québec's Sébastien Proulx who had received the support of Trois-Rivières mayor Yves Lévesque during the campaign.