Plymouth is harder to identify. It's not just the Puritans at Plymouth, nor exclusively New England. It's merely everything that came with the second colonization. The Dutch are a foundational part of Yankeedom. In fact, New York should probably be considered more foundational than Plymouth. You would be right to identify Jamestown with the modern GOP. Traditionally it was represented by the Democratic party, but I assume you're familiar with that.

I should note these geists extend far beyond legitimate political guise.