51st state
Guam (formally the Territory of Guam) is an unincorporated and organized territory of the United States. Located in the western Pacific Ocean, Guam is one of five American territories with an established civilian government.
Politics of Puerto Rico
Puerto Rico is an organized unincorporated U.S. territory which has been given internal self-governing powers which are referred to as "Commonwealth" status. (The Commonwealth of the Northern Mariana Islands, located in the western Pacific Ocean, has a similar delegation of self-government powers by the United States.) Puerto Rico has more latitude over its internal affairs than the U.S. territories of Guam, the U.S. Virgin Islands, or American Samoa.