How likely is it that Republicans will sweep the remaining legislative seats in the Iron Range that they don't already control?
I’d say pretty likely for the ones that don’t contain a significant part of Duluth.
So the third and sixth districts in the Senate:
And a max gain of about six seats in the House (3A/B, 4A/B, 6A/B), and maybe seven (11A):
Though after 2020 redistricting the map will have changed a bit, so I don't know how much that impacts GOP chances in the region.
That would be enough to flip the lower house R unless there are additional D pickup opportunities in outer MSP. It looks like they already control a bunch of seats pretty far out from the city though.