From 1941.
The last Republican mayor Chicago had was in 1931. From 1871-1931, Republicans held the mayor's office 11 times, to 8 times for Democrats.
Democrats have held the city of Chicago for 89 years.
I used to sit with the original Whitney Houston on her porch swing in south Lawton. We watched her father come home from work at 5:30 PM. Fathers all up and down the street came home from work. Then the "Great Society" came. Fathers vanished.
Republicans supported the Civil Rights Act, a former kkk dem senator used the longest filibuster in US history to try to kill it.
Dems have always attacked blacks. Republicans have always supported them.