Hawaii is a state in its own right. Under that delusion you have 49 other instances. They elected to join the USA in 1959.
Nice how you fail to mention any actual context:
Hawaii was illegally annexed in 1898, then -against the native's resistence- controlled by an US appointed government in 1900.
The the US shipped in more soldiers, especially when Hawaii's importance as a naval base in the pacific increased after ww1.
When Japan attacked Pearl Harbor the US had 500000 people stationed there... about the same amount as living natives at that point. But just to be sure, they dissolved the local government and declared martial law for nearly a decade.
And after all this and with more and more US citizens immigrating to Hawaii on top of the massive amount of soldiers stationed there and finally making Hawaii natives a minority in their own country the US started a referendum to join the US.