What's an ED? Sounds like "electoral district", but I don't know that'd be for.
Yes, as in how big can a ward/state house district/state senate district, etc. be drawn within Chicago that voted for McCain.
as usual McCains best areas in cities are dominated by Jews and Catholics
in Mount Greenwood the biggest I could get was 30,140 people
in Rogers Park the biggest I could get was 14,595 people
in Edison Park the biggest I could get was 4,962 people
in Garfield Ridge the biggest I could get was 4,065 people
just for the record in NYC I can get over 2,200,000 people going from the Southshore of SI away up to Woodlawn, and over 115,000 in North East Philadelphia (I can push it to 190,000 in all of Philadelphia if I use the Delaware River and leave islands of spots not in the district)