Romney invoking Clinton to appeal to "rural, white, working class voters"

An NPR report today suggested that Romney, in his campaign rhetoric, is holding up Bill Clinton as a more moderate politician, in contrast to Barak Obama's partisanship, in an effort to attract "rural, white, working-class voters" who might have been Clinton supports and who might be tempted to vote Democratic in this year's presidential election.  Among other things (including the fact that Obama is also "using" Clinton to attract voters), I found interesting the collapsing of those three characteristics:

• rural
• white
• working class

I discussed this collapsing phenomenon extensively in a 2011 article, The Geography of the Class Culture Wars.