**The Rosemont riding in the October 5, 2026 Quebec general election features a tight contest between Parti Québécois candidate Pierre-Luc Brillant and Québec solidaire nominee Gisèle Pouhe Njall, with trader odds reflecting their near parity in recent projections.** The open seat—vacated by longtime QS MNA Vincent Marissal, who left the caucus and announced his retirement—has shifted dynamics from QS's 2022 plurality. Current models from 338Canada show the two parties in a statistical toss-up, with projected vote shares in the low-to-mid 30s and only marginal edges for PQ in simulations. Brillant's profile as a visible actor and musician, combined with emphasis on rebuilding Maisonneuve-Rosemont hospital, has helped PQ consolidate support in a riding where sovereignty and cultural issues resonate. Pouhe Njall's focus on social justice, housing, and community work has maintained QS competitiveness among progressive voters. Lower odds for Liberal David Lavoie, CAQ's Nour Aliyah Attié, and Conservative Mildred Mathieu align with their weaker historical performance and limited projected support. The race remains fluid ahead of the September 17 nomination deadline and the campaign's final weeks, where local turnout patterns, debates on health care and affordability, and any provincial polling shifts could widen or narrow the gap between the leading contenders.