Adam Curtis made a documentary about the Clinton/Blair elections, which unfortunately, I can’t remember the name of. It featured several interviews with self-described swing voters talking about their very narrow self-interests and their desires to pay lower taxes. This was in a context of post-1980’s destruction of class (and identity politics-based) solidarity through segmented marketing techniques. Swing voters at that time were not looking for, say, a party that was both good on civil liberties and social justice. They were looking out solely for themselves and had worked out they had power to demand more from ‘left’ parties than working class people could.
But, you know, #notallSwingVoters, I guess…