Here’s the list Degs. The correlation is more blue than rust I think.

(1st on the poverty rate list) Detroit, MI hasn’t elected a Republican mayor since 1961;
(2nd) Buffalo, NY hasn’t elected a Republican mayor since 1954;
(3rd) Cincinnati, OH hasn’t elected a Republican mayor since 1984;
(4th) Cleveland, OH hasn’t elected a Republican mayor since 1989;
(5th) Miami, FL has never had a Republican mayor;
(6th) St. Louis, MO hasn’t elected a Republican mayor since 1949;
(7th) El Paso, TX has never had a Republican mayor;
(8th) Milwaukee, WI hasn’t elected a Republican mayor since 1908;
(9th) Philadelphia, PA hasn’t elected a Republican mayor since 1952;
(10th) Newark, NJ hasn’t elected a Republican mayor since 1907.
(11) No Republican held ANY office in Pittsburgh for 65 years until two were elected in 1995.