By the way.... I sounded far more nasty than I meant, there.
Canada regularly forms new parties. But it has the parliamentarian system, so you can see more change in the populace. Crude example, off the top of my head (that is, without checking the books to confirm): The decline of the Union Nationale in Quebec after the Quiet Revolution (1960 election Jean Lesage) and the rise of the Parti Quebecois... the PQ built to 30% of the vote before getting a breakthrough in terms of seats in the legislature. There was a popular thing happening, and the political machine jumped on it. I would love to see the US move so far left that leftier parties pop up that pull the "middle" along with it. Right now, you seem to be a nation that has something more important to do: put fucking brakes on the rightward drift. Demonizing those that want to stop it may not be a productive thing, at this particular juncture. Ken.
