The Parti Québécois sailed to a third-straight Quebec byelection win on Monday, cementing the sovereigntist party’s momentum ahead of the 2026 provincial election and dealing a crushing blow to Premier François Legault’s governing party.

Former journalist Alex Boissonneault handily defeated Quebec Conservative Leader Éric Duhaime in the Arthabaska riding, flipping a seat that Legault’s Coalition Avenir Quebec has held since 2012.

While polls had suggested Boissonneault and Duhaime were neck-and-neck, the PQ candidate captured over 46 per cent of the vote, compared to just over 35 per cent for Duhaime.

“Tonight, we have achieved an extraordinary feat,” Boissonneault told supporters. “We have just reclaimed the magnificent corner of the country that is ours.”

The sovereigntist party also

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