After the Civil War, the role of the states was severely limited. But the famous cry of "states rights" rang out any time groups wanted to defend regressive legislature. There is a reason why the Republican party, who cling to power through anti-democratic means, constantly bitch and moan about states rights.
In 2022 does it make sense that a state like Georgia, should be able to set the rules of a Federal election? Given the history of our country where states ONLY exist because of colonial charters? There is nothing inherently unique about states other than some Englishman 400 years ago was given lease to them.
States Rights has always been an anti-democratic rallying cry, and the main mechanism that the Republican party uses to stay in control is by limiting who can vote. The outcome will be large-scale disenfranchisement of poor people and African-Americans in southern states.
After responding to a lot of your comments it seems like you don't have a great grasp of US history. A lot of it seems sanitized/centered on Civics but without an actual understanding of why the system is set up the way it is and how the power dynamics have played out under that system. I would encourage you to read about the history of the Southern US starting from the earliest days of Virginian and Carolinian tobacco plantations. If you want to understand why a lot of your arguments serve only to embolden anti-democratic reactionaries, and have been for the last 200+ years.