The tight contest in Saint-Henri–Sainte-Anne stems from the riding’s transition to Québec solidaire control in the 2023 by-election, where incumbent Guillaume Cliche-Rivard capitalized on the urban Montreal district’s progressive leanings on housing, immigration, and social services after decades of Liberal dominance. Current projections classify the race as a toss-up between Cliche-Rivard and Liberal challenger Benoit Clermont, with CAQ candidate Anthony Lavoie also in the mix, amid a short provincial campaign launched August 27 for the October 5 vote. Traders price outcomes near even odds because incumbency visibility, ground organization, and early positioning have not yet produced clear separation, while province-wide polling volatility and recent leadership debates add uncertainty. Key factors that could widen gaps include turnout among anglophone and progressive voters, candidate debates, shifts in party standings, or late endorsements before the election.