The only realistic solution is independence. If there exists on the island a significant minority of people opposed to any links with the United States, they will be a
constant and intense irritant to the political process. They best solution is to cut the island loose. Give it a generous financial settlement but let it go.
"significant minority of people opposed to any links with the United States, they will be a
constant and intense irritant to the political process."
Well, you in the mainland have close to half of your population consisting of characters like democrats, the ANSWER crowd, greenies and similar assortment of lefties, which are a constant and intense irritant to the political process already.