The Democrats have been the party of the rich for quite some time now.
These are ten wealthiest Congressional districts in the country:
CA-17 - Ro Khanna - Democrat
CA-18 - Anna Eshew - Democrat
VA-10 - Jennifer Wexton - Democrat
NY-03 - Tom Suozzi - Democrat
CA-14 - Eric Swalwell - Democrat
CA-15 - Kevin Mullin - Democrat
NJ-07 - Thomas Kean Jr - Republican
NJ-11 - Mike Sherrill - Democrat
NY-04 - Anthony D'Esposito - Republican
CA-12 - Barbara Lee - Democrat
And Biden won NY-04 by double digits and it was represented by Democrats for almost 30 years until 2023.