What is "mainstream America"?

[Earth]

"Mainstream America" is another phrase for culturally dominant ideology. It doesn't have to be thought of negatively, just that it provides the baseline of "consumer concerns" by the middle class.

"Equality", real or imagined, doesn't invalidate the concept of Mainstream America. Multiple ethnicities don't set the cultural agenda, whatever we may agree them to be.

[Earth]

Specific populist rhetoric exploited by politicians doesn't make it a myth.