What changed in Vermont over the past century?

[bore]

It's not the commuters which make Connnecticut and, especially New Hampshire Democratic because the suburbs are actually the most republican area of the state. And it's not just Vermont, in similar areas of New England to Vermont- like northern and Western New Hampshire, Northern New York, and most notably Western Massachusetts- the voting patterns are similar, although slightly less Democratic.

Anyway the reasons I've heard are migration from NY, where people like Sanders and Dean came from, although I don't think this can explain the margins. Anti southern feeling, bearing in mind the Republicans are a very southern party now,  and anti war feeling, again because the Republicans are seen as the pro war party. But I think most of the change can be put down to the later two, because in areas which haven't seen mass immigration from NY the changes have been similar.