Northern New York

[Okay, maybe Mike Johnson is a competent parliamentarian.]

I often wonder if the old Yankee Republican strongholds would still be Republican (or at least competitive) had the "southern drift" never happened.

But consider how in 1972, despite the Southern Strategy, Nixon had no problem sweeping Landon Country (he topped 60% in ME, NH, VT, upstate NY and northern PA)...

1968 would be a better example, because in 1972 that was true of most of the United States.