Now about Puerto Rico...
Puerto Rico has pretty much been promised statehood if it wants it.
At one time there was a large independence movement with a bit of violence around the edges. In 1954 four Puerto Rican nationalists shot five members of the House of Representatives from the visitors gallery. They all survived.
The present status of this question is confused. Every ten years or so there is a vote between statehood, independence and continuation of commonwealth in association with the US.
A referendum on the political status of Puerto Rico was held in Puerto Rico on November 6, 2012.
The results were unclear. For those who are interested there is Wikipedia:
2012 Puerto Rican Status Referendum