Friedersdorf follows up on Santorum's assertion that the term "middle class" should not be part of the "Republican lexicon." He concludes: 

[M]ost Americans hear and use the term "middle class" without thinking that anyone is implying a formal class system, let alone trying to stoke "class warfare." So I'd put this in the category of obscure talking points that some movement conservatives adopt instead of taking the time to formulate more substantive and serious critiques of their political opponents.