How did they form? What are their specific traits? Stereotypes (even untrue, if marked as such)?
If cultural differences coincide with geography, please mention in, too.
In the questions about weird things people from different continents do somebody pointed out, that Europeans have little knowledge of this, so please fix my ignorance.
Recent political shifts have substantially pitted "heartland" (Central states) against "coastal elites"; "heartland" is depicted as rural/traditionalist/uneducated whereas the coasts are rich and intellectual (with negative connotations for both)
Anti-intellectualism is a plague. Plus we're not all elites over here!