There is a rhythm to political departures. Some come with trumpets, others with a quiet closing of a door. For Scott Aitchison, the rhythm appears to be the latter—a decision made, shared privately, and now rippling outward through the halls of Parliament Hill. Two sources have told CBC News that the Conservative MP for Parry Sound–Muskoka is expected to resign his seat later this fall .
A senior Conservative source said party leader Pierre Poilievre was informed last week that Aitchison plans to leave at the end of the fall sitting . An announcement had been planned for next week. Aitchison's office did not immediately respond to requests for comment .
The timing carries its own significance. The House of Commons already has six vacant seats, and Aitchison's departure would add another . More departures have followed across party lines in recent months, a slow exodus that speaks to the wear of prolonged political service. Aitchison, first elected in 2019, brought to Ottawa a background in municipal politics—decades on Huntsville Town Council, including a term as mayor .
His tenure in federal politics included a leadership bid in 2022, when he sought the Conservative crown that ultimately went to Poilievre . He finished fifth in that contest, but the campaign left its mark: housing emerged as a central theme of his platform, and Poilievre later named him the party's housing critic . It was a role that suited him—a former mayor who understood, from the ground up, how shelter shapes a community.
Sources described his decision as one of pursuing other opportunities after more than thirty years in elected politics . That span deserves acknowledgment: three decades of council meetings, budget debates, door-knocking, and the slow work of representing a vast rural riding a few hours north of Toronto . Not everyone leaves on a high note, and not everyone needs to. Some departures are simply the end of a chapter.
For Poilievre, the resignation presents a practical challenge. Poll aggregator 338Canada suggests Parry Sound–Muskoka could flip to the Liberals if a byelection were held today . Aitchison won the riding in 2025 with a ten-point lead over the Liberals . The seat is not automatically safe, and a byelection would carry its own weather.
Yet the larger story may be less about a single riding than about the slow churn of institutional memory. When MPs like Aitchison leave, they take with them the accumulated knowledge of how committees function, how ministries respond, how a problem in a small Ontario town connects to a policy debate in Ottawa. That knowledge is not easily replaced.
No formal statement had been issued as of this reporting. The office remained quiet, and the sources spoke on condition of anonymity . But in Canadian politics, the quiet departures often speak loudest—not of scandal or conflict, but of service rendered and a life's season turning.
Image Disclaimer: This article's illustration was created using artificial intelligence tools.
Sources: CBC News, CTV News, Vancouver Sun, The Spec, Radio-Canada
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