Rudi had the support of the NYPD. Chicago is so dysfunctional (like many other large, invariably single-party (D) cities -- eg Detroit, Newark and Baltimore) that it could be hopeless.
In Chicago, a street prostitute is more likely to have sex with a cop than to be arrested by one. The CPD would need to clean up the CPD first. Chances of that ever happening?
About the same as in Memphis 0.