My perspective is that the Overton window for politics in the U.S. is very narrowly defined between what I would consider to be two center-right parties, econom

My perspective is that the Overton window for politics in the U.S. is very narrowly defined between what I would consider to be two center-right parties, economically speaking. If you had more of a political spectrum of representation/viability, then you'd probably see more political diversity as you do in many parliamentary governments around the world. There does seem to be more of this emerging in the U.S., although it's still in very small pockets -- for example, you will find some socialist groups that intermix aspects of social conservatism or traditionalism with leftist economics.