Even better, if you read the opinion of the IL supreme court in the recent Rahm case, you will see that many people in IL have no right to vote.
IL requires a residency of 30 days to vote.
Residency is now defined by the IL Supreme court to mean that you currently intend to stay there and intend to always return if you ever leave.
So suppose you move to IL to take a job, but don’t particularly intend to stay there forever, but you live there for 20 years, you still cannot vote in IL.
Now, this is obviously untrue, but it is the current precedent in IL.