It’s a good concept, but doomed to be inaccurate. States themselves are often quite divided. I’ve lived all over Yankeedom and can conclude the vast majority of Massachusetts, southern New Hampshire (where the majority of the population is), southern Maine and almost the entire coast (again, the population dense areas), and then large swaths of Vermont (most notably the population dense Chittenden and Washington counties) – are all deeply blue to extremely progressive.
The more sparsely populated areas of rural inland Maine, northern New Hampshire, and northeastern Vermont are red areas.