and next, russia will want alaska and france the statue of liberty.
One difference is that Arizona never owned the Grand Canyon.
Another is that Arizona already has sovereignty over it, Notice you have to have a state fishing license to fish in a NP, and a state burn permit, etc. That's sovereignty at work. Notice they are not claiming any sovereignty they do not have, such as federal military enclaves and Indian reservations.
Oh and there is an exception in the amendment for "Lands of the United States", which last time I checked included the Grand Canyon National Park.
Unless they are claiming either ownership or exclusive sovereignty (the act specifically claims the same sovereignty as all other states) its a silly, empty gesture.
