Also Niagara Falls.
Most of those seats are held by the federal Conservatives currently. Granted the federal party won those ridings with 30%-40% of the vote and in 2018 Ford cleared 40% in Oshawa and Essex and lost those two ridings. But if Ford wins Niagara Centre it will be a first by either the federal or provincial conservatives. (As far as I know)
Anyway in addition to those ridings, I was thinking about more northern areas in Ontario, Manitoba, and B.C. On that note, the Saskatchewan Party defeated the provincial NDP in a byelection in a northern riding to
day. Also the CPC flipping Liberal seats in rural Newfoundland.
Good points that I didn't think of - I was thinking more from a direction of travel perspective. Ironically, I thought Nickel Belt, Algoma were too safe for the provincial NDP and if the PCs gain anything up there it'll be the two special ridings.