Claim: Puerto Rico is an unincorporated region of the United States.
Evidence: Puerto Rico -LRB- Spanish for `` Rich Port '' -RRB- , officially the Commonwealth of Puerto Rico -LRB- Estado Libre Asociado de Puerto Rico , `` Free Associated State of Puerto Rico '' -RRB- and briefly called Porto Rico , is an unincorporated territory of the United States located in the northeast Caribbean Sea.