I very much doubt Hawaii would ever want to be a monarchy again.
Let's face it, monarchies are archaic. A few countries cling to them because of tradition, but I don't see them coming back to any country that has been without for more than a decade.
There's that word again.
'A few countries cling to them because of tradition'. Yikes. It takes a special kind of arrogance to make that statement. Every 4th country in the world is a monarchy. 7 of 10 of the richest ones are monarchies. 8 of 10 of the most democratic ones. 8 of 10 of the most literate and educated ones are.
These countries, mine included, are not monarchies because of tradition, although that is always a factor (just like gun totin', land o' the free-celebratin' people in a certain republic across the waters hang on to their 'traditions', come hell or high water), but we are monarchies because it works.
There is no head of state with more amassed knowledge and experience than H.M Queen Elizabeth II.
I can't think of a single head of state that gives stronger, more moving and more inclusive speeches than H.M King Harald V of Norway.
There are few heads of state who safeguard the territorial integrity of their land more than H.M King Philippe of the Belgians.
Anyway. About Hawaii. I suppose you might not think the state will ever return to a monarchical state, and that may be true, but since the United States overthrew a monarchy that was popular to conquer and include the islands in their American union, the islands obviously could say 'aloha' and be as independent as they once was, if they so chose.
I don't think that's the solution they would choose if faced with the options, but instead they might opt for a 'monarchy within the union'-solution.
Article IV, section 4 of the U.S constitution doesn't necessarily ban a monarchical solution for a state. It guarantees their
right to have one, but it does not
require them to have one. Therefore, if they choose not to, it's quite arguable that this is a wish that could and should be granted.
If the U.S was faced with the option of accommodating Hawaii, or losing Hawaii from the union altogether, I'd bet good money on the former being preferred by all.