Chateauguay--Les Jardins-de-Napierville

Located on Montreal's South Shore in the Monteregie region, this riding spans the city of Chateauguay and the agricultural flatlands of the Jardins-de-Napierville regional county municipality, stretching south toward the U.S. border. The territory encompasses suburban neighbourhoods along the Chateauguay River, the Kahnawake Mohawk reserve's southern border, and dozens of small farming communities where vegetable production, field crops, and market gardening dominate the economy. The 2022 redistribution expanded the riding southward, adding Hemmingford, Howick, Saint-Chrysostome, and several other municipalities from neighbouring Salaberry--Suroit.

Candidates

Nathalie Provost (Liberal) -- A mechanical engineering graduate of Ecole Polytechnique de Montreal, Provost was one of the survivors of the December 6, 1989 shooting at the school, in which she was struck four times. In the decades that followed, she became one of Canada's most prominent gun-control advocates, co-founding the PolySeSouvient advocacy group and serving as its spokesperson. She received an honorary doctorate from Ecole Polytechnique in 2022 in recognition of her public service. Before entering federal politics, she worked as an engineer and briefly served as vice-chair of the Canadian Firearms Advisory Committee from 2017 to 2019. Her candidacy in 2025 was her first run for elected office.

Patrick O'Hara (Bloc Quebecois) -- Born in British Columbia and adopted by a farming family in Mascouche, O'Hara studied business administration at McGill University and spent over 15 years as an owner and general manager in the restaurant industry, including operating a Cage aux Sports establishment in Saint-Constant. He later held senior positions at Les Entreprises Robert Thibert, rising to vice-president of marketing, communications, and business development for North America. Active in the community through the Anna Laberge Foundation and the Gisele Faubert Foundation, he ran in the predecessor riding in 2021 and lost by just 12 votes -- the closest margin in the country.

David De Repentigny (Conservative) -- A Napierville resident who joined the Canada Border Services Agency in 2006 at the Saint-Bernard-de-Lacolle border crossing, De Repentigny is also a lieutenant with the Napierville Fire Department. A self-described non-traditional candidate who left school early and worked a variety of jobs before finding his career in public safety, he campaigned on border security, orderly immigration, and restoring resources to frontline officers.

Hannah Wolker (NDP) -- The NDP standard-bearer in the riding, Wolker campaigned on affordable housing, pharmacare, and strengthening public services for working families in the suburban and rural communities of the riding.

Martine Desrochers (Green Party) -- The Green Party's candidate, Desrochers focused on environmental protection, sustainable agriculture, and climate adaptation in a riding where farming is a way of life.

Nicolas Guerin (People's Party) -- Running under the People's Party banner, Guerin advocated for reduced immigration, lower taxes, and opposition to carbon pricing.

About the Riding

Chateauguay--Les Jardins-de-Napierville has a population of approximately 114,000. The city of Chateauguay is the urban anchor, with about 50,000 residents and a notably diverse population -- roughly 23 per cent visible minorities, with significant Black, Arab, and Latin American communities. English is spoken at home by nearly 30 per cent of Chateauguay residents, giving it one of the highest anglophone concentrations in the Monteregie. South of the city, the landscape shifts dramatically to the wide, flat farmland of Les Jardins-de-Napierville, one of Quebec's most productive agricultural zones, where vegetable farming, grain, and greenhouse operations predominate.

The riding's proximity to the U.S. border at Lacolle makes cross-border trade and border security perennial issues. The Lacolle border crossing -- which became nationally prominent during the irregular migration wave at Roxham Road between 2017 and 2023 -- lies within the riding's territory, and border management featured in the 2025 campaign. The 2025 contest drew national attention as a high-profile matchup: Provost, the Liberal star candidate and gun-control icon, faced O'Hara, who had lost by 12 votes in 2021 and was determined to flip the seat for the Bloc. Key campaign issues included agricultural protections under supply management, the impact of U.S. tariffs on local farming and manufacturing, cost-of-living pressures, housing affordability in Chateauguay's growing suburbs, and gun-control legislation.