They are corrupt. They are all criminals. Nothing they do surprises anyone who's ever taken a look at the place more than a second.
Compounding the problems you normally run into with a crooked politician, the Chicago politicians are also inherently evil. Their support of abortion and commercial trade in human embryos arises out of their interest in seeing people die, and the more who die, the more they love it.
If they could they'd sell their grandmothers, their own children, their wives, their brothers and sisters, into slavery.
There is this story I heard that, on Election Day 1960, then-Mayor Richard Daley "got" John F. Kennedy the necessary votes to carry Illinois and defeat Richard Nixon.