[jamaksin]

Has there ever been an agreed upon definition of "the middle class" in the United State?

Are there regional differences?

What specific parameters would be used to identify them? For example, annual income (wages or unearned), level of eduction, property ownership, savings, trust funds, average tax burden, ... ?

[Sooth2222]

"Has there ever been an agreed upon definition of "the middle class" in the United State?"

There is a real definition: http://en.wikipedia.org/wiki/Middle_class

But in the United States? In 2015? By the mainstream media? Who might or might not have ever taken a course in sociology, and who probably forgot 95% of anything they might have ever learned? Like "marriage", it's definition has been twisted into a pretzel. Politicians use it to mean "people who I want to vote for me". (But at least I think most here can agree that Zero and Moochelle are "lower class".) Notwithstanding what most seem to think, "class" doesn't have much if anything to do with money.