Small states with only one district for U.S. Representatives do not have a gerrymandering problem. With only one district, no party can ensure an outcome by deciding where boundary lines are fixed.
Illinois could solve our gerrymandering problem in much the same way. Some of us remember the “bed sheet ballot” of the 1960s when state districts couldn’t be fixed in time. It simply meant everyone who was elected represented the entire state and not just the political and monied few in each district today.
Imagine how our 18 representatives might vote if they were responsible to all 12 million of us. Article one; section two of the U.S. Constitution doesn’t require special districts. It just specifies the number of representatives.