Lake is less wealthy than I thought. But then I realized that most of Chicago's tony North Shore suburbs are in Cook County.
Most of Chicago's white ethnic groups moved westward when they suburbanized, right? Except for Jews who started out on the West Side but moved northward.
While this doesn't always happen in DuPage or Lake, it's important to remember - given basic math - that the wealthy areas in a wealthy county can vote something like 60%-40% Republican, the not-so-wealthy or heavily minority areas can vote 80%-20% Democratic, and the county can be blue. Obviously, in such an example, it does not indicate affluent voters favoring Democrats just because they live in an "affluent county" that does.
