The Quebec riding of Arthabaska held a closely watched by-election on August 11, 2025, with voters choosing between candidates from the Parti Québécois (PQ), the Conservative Party (CON), the Liberal Party (LIB), and the Coalition Avenir Québec (CAQ). The by-election was notable for the provincial Conservative leader Éric Duhaime contesting the seat. Early results showed a tight race primarily between PQ candidate Alex Boissonneault and Duhaime. As votes were counted, Boissonneault maintained a lead, ultimately winning the seat with 46.3% of the vote, marking a gain for the PQ from the CAQ, which saw its support collapse from 51.8% in the 2022 election to 7.2%. Duhaime finished second with 35.2%, an increase of 10.5 percentage points from the previous election, while the Liberals secured 9.3%. The Quebec by-election result reflects shifting political dynamics in the province, with the CAQ's significant decline and the PQ's resurgence in Arthabaska. Concurrently, a federal Abacus poll conducted on August 7, 2025, indicated the Liberal Party leading with 43% of decided voters nationally, followed closely by the Conservatives at 40%, with the New Democratic Party (NDP) at 8%. Approval ratings showed Mark Carney with a net positive approval of 19% nationwide, including 41% in Quebec, while Conservative leader Pierre Poilievre had a net approval of +1% nationally but -21% in Quebec. Additionally, a national survey found that seven in ten Canadians support mandatory national service for young adults, though opinions vary on the form such service should take.