All this week, we’ve been profiling races for Chicago aldermen. Yesterday, we profiled the 4th and 5th wards, encompassing the South Side neighborhoods of South Shore and Hyde Park. Today we go north, to the 40th, where Mayor Emanuel’s City Council floor leader is facing a challenge. Mike Fourcher is with Aldertrack and joins us on the Afternoon Shift Mike Fourcher is one of the founders of Aldertrack