Puerto Rican citizenship
In 1952, upon U.S. Congress approving the Constitution of the Commonwealth of Puerto Rico, also reaffirmed that Puerto Rican citizenship continued in full force. This was further reaffirmed in 2006 while the U.S. Senate probed into the President's Task Force on Puerto Rico's status. In 1953, U.S Ambassador Henry Cabot Lodge Jr., in a memorandum sent to the United Nations, recognized that "the people of Puerto Rico continue to be citizens of the United States as well as of Puerto Rico."
Isabel González
Prior to 1898, the United States had organized new acquisitions from non-tribal governments into largely self-governing territories as a prelude to statehood and had generally extended broad constitutional protections and U.S. citizenship to free, non-tribal residents. After 1898, this process changed and in Puerto Rico, Congress established a centrally controlled administration and declined to recognize Puerto Ricans as U.S. citizens.