While otherwise strongly disliking Chicago and their north side baseball team, I can confirm that Chicago dogs are incredible when done right
Wisconsin does Bratwurst however....grilled heavily over CHARCOAL NOT GAS, and then simmered in beer and onions. Serve on a Sheboygan hardroll with sauerkraut and stone ground mustard. My heavy German/Austrian heritage is picky about this whole process lol.
You can't drive longer than a half hour without finding a local Brat fry during the summer.