Folks this is the link to the audio piece that Richard mentioned on NPR.

From 848 on WBEZ.org:
Reviewing Returns and Run-Offs

We examine the results of Chicago’s municipal elections with political analyst Russ Stewart, University of Illinois at Chicago Professor of Political Science Dick Simpson and Chicago Public Radio Political Reporter Ben Calhoun.

from the about 848 page
During each Eight Forty-Eight, host Steve Edwards and a team of producers, contributors, and writers set out to capture the many voices and views of the Chicago region. Eight Forty-Eight features Chicago Public Radio's news reporters and music hosts as well as contributors who specialize in various topics. These topics range from politics to the arts, science to sports, and everything in between.