Right now, we aren’t seeing a collapse of Donald Trump. Instead, we’re seeing (a) Clinton 2 steady at about 45% in the four way race and (b) Trump moving from about 40% to 43%. That means that the third party vote is collapsing. Johnson is dropping from a summer high of 10% to 4%. How can that be?
My current favorite explanation is the “parking lot” theory of American third parties. Most people today are highly polarized, which means they strongly sort themselves into parties and stick with it. A number of people, including myself, have argued that parties are a sort of social identity. Perhaps not as fundamental as gender or racial identity, but important none the less. The consequence of party-identity theory is that people usually become defensive about their identity and they are loathe to leave it.
“Parking lot” theory is a corollary of party-identity theory. When…
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