The GOP in the NE of the US are weak and feckless RINOs, period.
Maine, like the Atlantic Provinces in Canada, is an enigma. A small mostly rural or small town population, generally very polite, religious, law abiding, and still mostly white. But when it comes to politics they lean heavily to the left. I don’t know the situation in Maine, but in Atlantic Canada it’s primarily based on economic dependence on the federal government. We’ve had a hundred years of economic malaise, with vast federal subsidies and high simultaneously propping up our economies, and stifling growth. It’s infuriating.