On January 13, the U.S. Supreme Court heard Puerto Rico v Valle, 15-108. The case involves criminal law, but it requires the Court to decide if the government of Puerto Rico is sovereign or whether it is subservient to the United States government. According to this story, a majority of justices appear to be leaning in the direction that Puerto Rico is not sovereign. The story says Justices Stephen Breyer and Sonia Sotomayor are adamantly opposed to that idea, however.
UPDATE: here is a very detailed story about the oral argument from Scotusblog.
Make ALL U.S.A colonies a State, a part of a State or make them independent.
See the collapse of the Brit Empire and its many ex-colonies.