Every state is winnable for both parties. If it wasn't for Larry Hogan, everyone would have Maryland on this list, but they have a Republican governor.
That may be true about Maryland, but I did say "pretty much unwinnable". So e.g. would the party still be unable to win a gubernatorial election even when it benefits from:
*A good national environment
*A particularly strong candidate
*A particularly weak (but not necessarily Roy Moore-level) opponent
*The opposing party's unpopularity in the state for whatever reason (e.g. Sam Brownback dragging down Republicans in KS in 2018)
Taking this into account, I’d substitute Washington for Oregon on your map, add Alabama, and
maaaaybe strike Delaware or South Carolina. I could see either of those last two being won by the minority party at the state level given, say, a Kobach–like majority–party candidate, a Billie Suttonesque minority–party candidate, and a favourable national environment.
