Sources

https://www.lwv-rva.org/levels-of-government-how-federal-state-and-local-government-work-together/

https://plato.stanford.edu/entries/federalism/#HisFedWesTho

https://judicature.duke.edu/articles/foundations-of-u-s-federalism/

https://www.civiceducationva.org/federalism5.php