There's been a lot of talk about each party's ceiling in the Senate elections, but what about for the gubernatorial ones? Here is my take
Democratic:
Republican:
Obviously the term "ceiling" is subjective and there's a lot of room for debate. My interpretation of a ceiling is a party winning every single race that is "competitive." For example, I consider Oregon, Minnesota, Maryland, New Hampshire, Ohio, Texas, and Nevada all to be "non-competitive"; in other words, due to candidate strength and other fundamentals of the races, Republicans would be unable to pick up Oregon, Minnesota, Maryland, New Hampshire, or Rhode Island, even if there was to be a massive Republican wave, and the same goes for Democrats with Ohio, Texas, and Nevada. What do you all think?
Interesting observation: In each of these ceiling maps, the losing party wins exactly 8 races.
I'd take IA/OK/SC off your D map and HI/RI off your R map (but adding MN).