Of the Leaders of the Opposition, John Reynolds, Bill Graham, and Rona Ambrose are the only interim party leaders to have resided at Stornoway; Ambrose was the most recent resident after being selected as interim leader of the Conservative Party after the defeat of Stephen Harper in the 2015 Canadian federal election. All other residents have been permanent party leaders (ratified at a leadership convention).. Andrew Scheer moved in after being elected as leader of the Conservative party in the 2017 leadership election, and Erin O'Toole moved in after being elected as leader of the Conservative party in the 2020 leadership election.