Conservative MP Scott Aitchison to resign by year-end
Eighth Conservative MP to leave caucus since last election, triggering potential by-election test.
1Resignation timeline
Conservative MP Scott Aitchison plans to resign his Parry Sound—Muskoka seat before 2026 ends, according to sources. The former Huntsville mayor (2014-2019) and 2022 leadership candidate (finished fourth) would become the eighth Conservative MP to leave since the last election. His departure follows recent resignations including Larry Brock, who returned to work as Crown prosecutor.
2Electoral history
Aitchison first won the rural Ontario riding in 2019 after decades in municipal politics. He secured the seat with a 10-point lead over Liberals in 2025. The region, located a few hours north of Toronto, now faces potential political shift as polling suggests it could flip Liberal in a by-election. This mirrors recent Conservative losses in Quebec's Chicoutimi—Le Fjord by-election.
3Leadership context
Aitchison's 2022 leadership bid against Pierre Poilievre positioned him as a moderate voice within the party. His fourth-place finish among four candidates reflected internal dynamics that may influence post-resignation party positioning. The departure comes as Poilievre manages multiple by-election challenges, including filling Brantford—Brant South's vacancy.
4By-election calculus
Poll aggregator 338Canada indicates Parry Sound—Muskoka could become competitive if vacated. The riding's shift potential mirrors broader Ontario political trends where urban-rural divides are testing Conservative strongholds. Aitchison's municipal roots previously helped secure the area, suggesting local candidate selection will be crucial for Conservatives.
5Timing implications
The resignation's late-2026 timing avoids immediate by-election pressure but leaves the seat vulnerable before next general election. This follows a pattern of Conservative departures creating management challenges for Poilievre. The party must balance candidate selection between local representation and national party alignment.
6Regional representation
Aitchison's background as Huntsville mayor brought unique local governance perspective to Parliament. His departure removes rural Ontario voice from caucus as the party navigates urban-rural policy tensions. The riding's next representative will need similar deep community ties to maintain Conservative foothold.
7Party dynamics
Multiple resignations strain Conservative resources ahead of election cycle. Each departure requires by-election campaigning while managing national messaging. Aitchison's moderate profile exit may influence internal party balance as Poilievre consolidates leadership ahead of next federal contest.
8Strategic consequences
Aitchison's planned exit tests Conservative organizational capacity in Ontario heartland. The party must defend traditional strongholds while expanding urban support. Losing Parry Sound—Muskoka would signal erosion of rural base that has anchored Conservative electoral success in recent decades.
Original article: National Post - RSS Feed — Conservative MP Scott Aitchison to resign by year-end