Puerto Rico is a U.S. territory, and as such, its residents are U.S. citizens by birth. Puerto Ricans have all the rights and responsibilities of U.S. citizenship, including the right to vote in presidential elections, serve in the military, and travel freely within the United States. However, Puerto Ricans do not pay federal income taxes and do not have voting representation in Congress.
Northern Mariana Islands
The Northern Mariana Islands (NMI) is also a U.S. territory, but its residents are not U.S. citizens by birth. Instead, they are considered to be U.S. nationals. This means that they have most of the rights and responsibilities of U.S. citizenship, but they cannot vote in presidential elections, serve in the military, or travel freely within the United States without a passport. However, NMI residents can become naturalized U.S. citizens by applying for citizenship through the U.S. Citizenship and Immigration Services (USCIS).