I do not really know what they will do, or what they should do for them, but for the united states i think it would be great to adopt them as a state. More revenue is never bad.
Run your own nation, play Cybernations."Conservatism is the blind and fear-filled worship of dead radicals."
- Mark Twain
Keep in mind, joining the union as a State is a one way street. A State cannot un join the union.
If there is any question on this see the Civil War.
Puerto Rico should do whatever Puerto Rico wants to do. I really don't care one way or the other.
If you build a man a fire, he'll be warm for a day.
If you set a man on fire, he'll be warm for the rest of his life.