Look at economic policy, housing policy, education policy.
Which is why those Democrats greeted the liberal wing of their party with such warmth in 1968, huh?Most notably, Democrats have ruled over Chicago as mayor since 1931. Every Chicago alderman is a Democrat. Previous to 2011 there had only been one Republican alderman in at least two decades.
There's nothing liberal about Chicago Democrats. Nothing especially conservative, either, at the end of the day. Party affiliation is a conduit of power. Period.
Being a Democrat in Chicago says absolutely nothing about your politics. It's a hint as to where you get your clout. That's it.