Even though an executive order is not a law, the regime has been acting like it is.
Preserving and Protecting the Integrity of American Elections
Any in-person vote without a valid ID (passport is one of the few considered enough) will be challenged. Not to mention the challanges to mail in ballots.
States do control their elections, but plenty of regime friendly states will just let the regime control it. Allowing the regime to make challanges in key areas easier.